diff --git a/recognization/code/engine.py b/recognization/code/engine.py
index 932060f..51aa1ad 100644
--- a/recognization/code/engine.py
+++ b/recognization/code/engine.py
@@ -520,7 +520,9 @@ class RecognitionEngine:
             text_rank = sorted(
                 text_lane.scores_from_text(read).items(), key=lambda kv: kv[1], reverse=True
             )
-        return DecisionPolicy().decide(lane.rank(crop), text_rank, text_read=read)
+        return DecisionPolicy(signatures=text_lane.signatures if text_lane else None).decide(
+            lane.rank(crop), text_rank, text_read=read
+        )
 
     def score_crop_lanes(
         self, crop: Any, method: Optional[str] = None, skip_ocr: bool = False
diff --git a/recognization/code/eval_identity.py b/recognization/code/eval_identity.py
index 1e12e51..05c7a30 100644
--- a/recognization/code/eval_identity.py
+++ b/recognization/code/eval_identity.py
@@ -397,7 +397,9 @@ class LocalLaneAdapter(Lane):
             self.text_lane.scores_from_text(read).items(),
             key=lambda kv: kv[1], reverse=True,
         )
-        return DecisionPolicy(local_accept=accept).decide(ranked, text_rank, text_read=read)
+        return DecisionPolicy(
+            local_accept=accept, signatures=self.text_lane.signatures
+        ).decide(ranked, text_rank, text_read=read)
 
 
 def _catalog_rows(stock_dir: str) -> List[Dict[str, Any]]:
diff --git a/recognization/code/identity_lanes.py b/recognization/code/identity_lanes.py
index b730d9f..c921240 100644
--- a/recognization/code/identity_lanes.py
+++ b/recognization/code/identity_lanes.py
@@ -37,7 +37,7 @@ if current_dir not in sys.path:
 import cv2  # noqa: E402
 import numpy as np  # noqa: E402
 
-from rebuild_catalog import bigrams, normalize_text, sku_of  # noqa: E402
+from rebuild_catalog import bigrams, normalize_text, signature_bigrams, sku_of  # noqa: E402
 
 # The local lane's accept line, in the units of `confidence()` below. Measured
 # on the corrected image6 labels: 2.0 keeps 95% of shown labels correct at 59%
@@ -49,6 +49,14 @@ LOCAL_ACCEPT = 2.0
 # picks the right SKU on 41-42 of the 55 facings where it reads anything.
 TEXT_ACCEPT = 0.5
 TEXT_MARGIN = 0.15
+# How many of the read's bigrams the winning row must actually contain. The
+# ratio alone is not evidence: a two-pair read the row happens to contain scores
+# 1.0, and "サソース" named sku_l08 that way. Two pairs is the floor that keeps
+# every correct text answer on image6 (40 of 40) while dropping the wrong ones
+# from 6 to 2, taking shown-label precision from 87% to 95%. It is a floor on
+# evidence, not on the ratio, so a long read of shared brand copy still scores
+# low and is still refused by the margin.
+TEXT_MIN_SHARED = 2
 # Reference pyramid heights. A ~1000 px packshot against a 110-250 px crop is a
 # 4-8x ratio, and ORB's 8x1.2 pyramid tops out at 3.6x, which is why ORB and
 # BRISK find zero inliers at live resolution. Scaling each reference to the
@@ -274,7 +282,7 @@ def identity_bigrams(read: str) -> set:
     local lane has already supplied the evidence and the text only has to
     contradict it.
     """
-    return {gram for gram in bigrams(_QUANTITY.sub("", normalize_text(read))) if not gram.isdigit()}
+    return {gram for gram in bigrams(_QUANTITY.sub(" ", normalize_text(read))) if not gram.isdigit()}
 
 
 def carries_identity(read: str) -> bool:
@@ -289,7 +297,12 @@ def carries_identity(read: str) -> bool:
     return len(identity_bigrams(read)) >= IDENTITY_BIGRAM_FLOOR
 
 
-def text_similarity(read: str, signature: str, weights: Optional[Dict[str, float]] = None) -> float:
+def text_similarity(
+    read: str,
+    signature: str,
+    weights: Optional[Dict[str, float]] = None,
+    vocabulary: Optional[Set[str]] = None,
+) -> float:
     """Share of the read text's bigrams that the signature explains.
 
     Asymmetric on purpose: the crop shows a few words of a package, the
@@ -304,11 +317,24 @@ def text_similarity(read: str, signature: str, weights: Optional[Dict[str, float
     crop actually shows. Measured on image6: every l10 facing reads
     "ピュア セレクト マヨネーズ" with no "コクうま" and no "65", yet l09 tied or
     won on shared brand text alone.
+
+    `vocabulary` is every bigram any signature can produce. A read's pairs
+    that no catalog name contains are OCR noise - a misread character, a
+    date, or a pair that spans two words the package prints separately
+    ("セレクト マヨネーズ" yields "トマ"). Counting them in the denominator
+    charges the row for text it could never have explained, which is how a
+    correct read of l10 fell to 0.46 while a garbage read of l11 stayed at
+    0.24: the noise is proportional to how much was read, so the rows with
+    the most real text to match were punished hardest. Bounded this way the
+    same reads score 0.86 and 1.0 against their true rows, and the garbage
+    read ties across three rows and is refused by the margin.
     """
-    read_grams = bigrams(normalize_text(read))
+    read_grams = bigrams(read)
+    if vocabulary is not None:
+        read_grams &= vocabulary
     if not read_grams:
         return 0.0
-    shared = read_grams & bigrams(normalize_text(signature))
+    shared = read_grams & signature_bigrams(signature)
     if not shared:
         return 0.0
     if weights is None:
@@ -329,7 +355,7 @@ def bigram_weights(signatures: Sequence[str]) -> Dict[str, float]:
     """
     counts: Dict[str, int] = {}
     for signature in signatures:
-        for gram in set(bigrams(normalize_text(signature))):
+        for gram in set(signature_bigrams(signature)):
             counts[gram] = counts.get(gram, 0) + 1
     total = max(1, len(signatures))
     return {
@@ -358,6 +384,12 @@ class TextLane:
         # Bigram weights over the catalog's own names, so the lane can tell
         # copy every sibling prints from the words that name one product.
         self.weights = bigram_weights(list(self.signatures.values()))
+        # Every pair any name can produce. A read's pairs outside this set are
+        # OCR noise or word-boundary artifacts, and counting them in the
+        # denominator charges a row for text it could never have explained.
+        self.vocabulary: Set[str] = set()
+        for text in self.signatures.values():
+            self.vocabulary |= signature_bigrams(text)
         self.ocr_engine = ocr_engine
         # The engine's OCR lock. Vision tolerates concurrency but the CPU does
         # not, and this lane runs one OCR per crop on the classify pool, so it
@@ -420,7 +452,7 @@ class TextLane:
         if len(normalize_text(read)) < 4:
             return {}
         return {
-            sku: text_similarity(read, signature, self.weights)
+            sku: text_similarity(read, signature, self.weights, self.vocabulary)
             for sku, signature in self.signatures.items()
         }
 
@@ -459,17 +491,31 @@ class DecisionPolicy:
 
     def __init__(
         self,
-        *,
         local_accept: float = LOCAL_ACCEPT,
         text_accept: float = TEXT_ACCEPT,
         text_margin: float = TEXT_MARGIN,
+        text_min_shared: int = TEXT_MIN_SHARED,
+        signatures: Optional[Dict[str, str]] = None,
         method: str = "rootsift",
     ) -> None:
         self.local_accept = float(local_accept)
         self.text_accept = float(text_accept)
         self.text_margin = float(text_margin)
+        self.text_min_shared = int(text_min_shared)
+        # The catalog names, so the evidence floor can ask how many of the
+        # read's pairs the winning row actually contains. Without them the
+        # floor cannot be applied and the ratio stands alone, which is the
+        # behaviour a caller that has no catalog is asking for.
+        self.signatures = {str(sku): str(text) for sku, text in (signatures or {}).items()}
         self.method = method
 
+    def _shared_evidence(self, read: str, sku: str) -> int:
+        """How many of the read's bigrams the row's name contains."""
+        signature = self.signatures.get(sku)
+        if signature is None:
+            return self.text_min_shared
+        return len(bigrams(read) & signature_bigrams(signature))
+
     def decide(
         self,
         local_rank: Any,
@@ -503,6 +549,7 @@ class DecisionPolicy:
             and text_top[1] >= self.text_accept
             and (text_top[1] - text_runner) >= self.text_margin
             and carries_identity(text_read or "")
+            and self._shared_evidence(text_read or "", text_top[0]) >= self.text_min_shared
             else None
         )
 
diff --git a/recognization/code/live.py b/recognization/code/live.py
index 54e7421..4fcef5c 100644
--- a/recognization/code/live.py
+++ b/recognization/code/live.py
@@ -181,6 +181,31 @@ def _iou(a: Sequence[int], b: Sequence[int]) -> float:
     return inter / union if union > 0 else 0.0
 
 
+def _shift_box(
+    box: Sequence[int],
+    from_origin: Optional[Sequence[float]],
+    to_origin: Sequence[float],
+) -> Optional[List[int]]:
+    """A box measured at one shelf origin, expressed at another.
+
+    The origin is the shelf position of the frame's top-left corner, so the
+    content moves the opposite way: a shelf that has slid left by 12 px means
+    the same product now sits 12 px further left in the frame, and a box
+    measured before the slide has to move with it.
+
+    Returns None when either origin is unknown. An uncompensated box is not a
+    weaker match, it is a match against the wrong product, so a caller that
+    cannot place the box must not use it at all.
+    """
+    if from_origin is None or len(from_origin) < 2 or len(to_origin) < 2:
+        return None
+    dx = float(from_origin[0]) - float(to_origin[0])
+    dy = float(from_origin[1]) - float(to_origin[1])
+    x1, y1, x2, y2 = box
+    return [int(round(x1 + dx)), int(round(y1 + dy)),
+            int(round(x2 + dx)), int(round(y2 + dy))]
+
+
 def _clear_of_edge(box: Sequence[int], frame_shape: Sequence[int], margin_ratio: float) -> bool:
     """True when a box sits clear of the frame edge.
 
@@ -670,11 +695,21 @@ class LiveSession:
         An inherited label is not a measurement, so it cannot spread to a neighbour.
         Blur, glare, and a too-far frame skip inheritance: the overlap is not
         evidence when the frame itself failed the quality gate.
+
+        Memory boxes are stored in the coordinates of the frame they were
+        measured on, so they are shifted by the shelf movement since then before
+        they are compared. Without that, a panning camera slides the scene under
+        a stale box: at 12 px/frame a ~90 px facing moves a full width in about
+        seven frames, so the neighbour overlaps the old box at IoU >= 0.55 and
+        inherits a label that was never about it. Measured on image6 at pan 12,
+        every unknown false accept was an inherited label landing on the two
+        products next to the labelled one.
         """
         if not self._label_memory:
             return
         if (self._last_quality or {}).get("hint"):
             return
+        origin = (self._frame_origin[0], self._frame_origin[1])
         for track in self._tracks.values():
             if track.state != STATE_DETECTED or track.confirmed:
                 continue
@@ -685,7 +720,12 @@ class LiveSession:
                     continue
                 if _iou(entry["box"], entry.get("label_box") or entry["box"]) < DRIFT_IOU:
                     continue
-                if _iou(track.box, entry["box"]) < LABEL_MEMORY_IOU:
+                moved = _shift_box(entry["box"], entry.get("origin"), origin)
+                if moved is None:
+                    # The shelf moved too far for this entry to describe
+                    # anything still on screen, so it cannot label a neighbour.
+                    continue
+                if _iou(track.box, moved) < LABEL_MEMORY_IOU:
                     continue
                 track.state = STATE_RECOGNIZED
                 track.confirmed = True
@@ -723,6 +763,10 @@ class LiveSession:
                 "confidence": track.identity.get("confidence"),
                 "score": track.identity.get("score"),
                 "seq": seq,
+                # The shelf origin this box was measured against. `box` is in
+                # that frame's pixels, so a later frame has to shift it by how
+                # far the shelf has moved since.
+                "origin": (self._frame_origin[0], self._frame_origin[1]),
                 "inherited": bool(track.identity.get("inherited")),
             }
         )
@@ -829,10 +873,20 @@ class LiveSession:
         planned: List[Tuple[TrackState, Any, int]] = []
         for track in eligible[:capacity]:
             crop = self.engine.crop(image, track.raw_box)
-            track.in_flight += 1
+            # No label_frame_id here: the plan may be dropped (generation
+            # mismatch, a crop that went off product, a neighbour's label
+            # arriving first), and a frame id stamped on a track whose label
+            # never came from this frame would pair a box with the wrong
+            # offset. The callback carries the id, and the writers that set
+            # `label_box` set the id with it.
             track.last_attempt_seq = seq
-            track.label_frame_id = int(frame_id)
             track.last_attempt_area = track.area()
+            # Counted here, not in the submitter: this is the only place that
+            # knows a crop is about to be in flight, and the callback is what
+            # decrements it. Without the increment the guard above never blocks
+            # and every frame re-plans the same tracks, so the executor queue
+            # grows without bound and the server stops answering.
+            track.in_flight += 1
             planned.append((track, crop, track.object_generation))
         return planned
 
@@ -846,14 +900,13 @@ class LiveSession:
         """Submit planned crops. Called WITHOUT the session lock held."""
         for track, crop, object_generation in planned:
             submitted_at = time.perf_counter()
-            # The label anchors to the displayed (smoothed) box, which is what the
-            # drift check later compares against.
+            # The label anchors to the displayed (smoothed) box, which is what
+            # the drift check later compares against.
             submitted_box = list(track.box)
             track_id = track.track_id
             # OCR once per object: a track that already has a reading re-runs
-            # only the local lane, which is the difference between 5 ms and
-            # 25 ms per crop. A native crop is preferred for the one reading
-            # because it is the sharpest view the phone will send.
+            # only the local lane. The native crop lane always reads, because
+            # it is only asked for when the frame crop was too small to decide.
             skip_ocr = bool(track.text_read)
             try:
                 future = self._executor.submit(
@@ -1031,10 +1084,11 @@ class LiveSession:
                 self._release_crop_slot(record)
                 self._crops_rejected += 1
                 return _crop_error("CROP_STALE", stale)
-            # A native crop is the sharpest view the phone sends, so it is the
-            # one worth reading - but only once per object, like the frame path.
-            track = self._tracks.get(track_id_out)
-            skip_ocr = bool(track is not None and track.text_read)
+            # A native crop is the sharpest view the phone sends, and the lane
+            # only asks for one when the frame crop was too small to decide
+            # (`crop_below_px`), so any reading it would skip came from exactly
+            # the crop this one exists to replace. It always reads.
+            skip_ocr = False
             try:
                 future = self._executor.submit(
                     self.engine.score_crop_lanes, crop, method, skip_ocr
@@ -1147,6 +1201,12 @@ class LiveSession:
         except Exception:
             scores, text_rank, text_read = {}, [], ""
         finished_at = time.perf_counter()
+        # Resolved before the session lock is taken. `identity_text_lane` builds
+        # the lane under its own lock on first use, and taking that while the
+        # session lock is held is a lock-ordering hazard: a frame loop that
+        # holds the session lock and waits on the lane lock while this callback
+        # holds the lane lock and waits on the session lock wedges the server.
+        text_lane = self.engine.identity_text_lane()
         with self._lock:
             track = self._tracks.get(track_id)
             if track is None or generation != self._generation:
@@ -1181,14 +1241,17 @@ class LiveSession:
                 track.score_sums[sku_id] = track.score_sums.get(sku_id, 0.0) + float(score)
             if observation:
                 track.score_n += 1
-            self._classify_times.append(finished_at - submitted_at)
-
             # The reading is cached on the track so later attempts skip OCR.
             # Only a read that could name something is cached: a crop that was
             # too small or too blurry says nothing about the next one, and a
             # read of just a size ("400g") matches every 400g product's size
             # line, so caching it would let one unreadable crop veto the
             # product for the rest of the track's life.
+            #
+            # The substitution happens before the early-out below and before
+            # the decision: a skipped OCR returns an empty ranking, and an
+            # empty ranking would both mark a text-only track unrecognized at
+            # max_attempts and stop the veto from firing on later attempts.
             if text_read and carries_identity(text_read):
                 track.text_rank = list(text_rank or [])
                 track.text_read = text_read
@@ -1235,9 +1298,9 @@ class LiveSession:
                 # chose. The newest crop is the evidence, not the mean: averaging
                 # in an empty observation halves a good confidence below the
                 # accept line, which is the dilution the cosine branch guards too.
-                decision = DecisionPolicy().decide(
-                    list(scores.items()), text_rank, text_read=text_read
-                )
+                decision = DecisionPolicy(
+                    signatures=text_lane.signatures if text_lane else None
+                ).decide(list(scores.items()), text_rank, text_read=text_read)
             else:
                 decision = decide_identity(mean_scores, method=method, scale=scale)
             track.candidates = [
diff --git a/recognization/code/rebuild_catalog.py b/recognization/code/rebuild_catalog.py
index 4d05406..0eb0ff4 100644
--- a/recognization/code/rebuild_catalog.py
+++ b/recognization/code/rebuild_catalog.py
@@ -133,14 +133,40 @@ def normalize_text(text: str) -> str:
     return "".join(char for char in value if char.isalnum() or char == "%")
 
 
+def signature_bigrams(text: str) -> Set[str]:
+    """Character pairs of a catalog name, never across a word boundary.
+
+    A pair that spans two words is not a substring of either one, so it can
+    only ever be noise - and expensive noise, because it is rare across the
+    catalog and IDF therefore weights it as highly distinctive. "キユーピー
+    アマニ油" used to contribute "ピア", which let the garbage read
+    "キユピアク5C" be accepted as that row.
+    """
+    pairs: Set[str] = set()
+    for token in text.split():
+        value = normalize_text(token)
+        pairs.update(value[index:index + 2] for index in range(len(value) - 1))
+    return pairs
+
+
 def bigrams(text: str) -> Set[str]:
+    """Character pairs of a read, across whitespace.
+
+    Deliberately not `signature_bigrams`: OCR puts spaces where the package
+    has none, so "ピュア セレクト" has to keep matching the catalog's
+    "ピュアセレクト". The catalog name is authoritative about where its words
+    end; a read is noisy evidence about the same characters, and dropping its
+    spaces is the only way the two can meet. The read is the side that gets
+    the benefit of the doubt, so the fake-pair problem is fixed where it
+    originates - in the signature - rather than by refusing to match.
+    """
     value = normalize_text(text)
     return {value[index:index + 2] for index in range(len(value) - 1)}
 
 
 def name_ocr_similarity(name: str, ocr_text: str) -> float:
     """Share of the catalog name's bigrams that the OCR text explains."""
-    name_bigrams = bigrams(name)
+    name_bigrams = signature_bigrams(name)
     return len(name_bigrams & bigrams(ocr_text)) / max(1, len(name_bigrams))
 
 
diff --git a/recognization/code/test_engine.py b/recognization/code/test_engine.py
index b014ed2..126106a 100644
--- a/recognization/code/test_engine.py
+++ b/recognization/code/test_engine.py
@@ -74,6 +74,99 @@ class TextLaneSignatureTests(unittest.TestCase):
         decision = DecisionPolicy().decide([], scores, text_read="マヨネーズ")
         self.assertIsNone(decision["best_sku"])
 
+    def test_a_signature_never_pairs_across_two_words(self):
+        """A catalog name must not claim text it does not contain.
+
+        "キューピー アマニ油" normalizes to "キユピ アマニ油"; with the space
+        dropped it was "キユピアマニ油", which contains "ピア" - a pair neither
+        word has. That pair is rare across the catalog, so IDF weighted it as
+        distinctive and the garbage read "キユピアク5C" was accepted as l02.
+        """
+        from rebuild_catalog import signature_bigrams
+
+        name = "キューピー アマニ油マヨネーズ 200g"
+        self.assertNotIn("ピア", signature_bigrams(name))
+        self.assertIn("アマ", signature_bigrams(name))
+
+    def test_a_read_keeps_matching_across_the_spaces_ocr_inserts(self):
+        """The read is the noisy side, so its spaces must not break a match.
+
+        Vision prints "ピュア セレクト" where the catalog name has
+        "ピュアセレクト". Refusing to pair across the read's spaces dropped
+        two correct l10 labels below the accept line, so the read pairs
+        across them and the signature is the side that stays strict.
+        """
+        from rebuild_catalog import bigrams
+
+        self.assertIn("アセ", bigrams("ピュア セレクト マヨネーズ"))
+
+    def test_a_garbage_read_does_not_name_a_row(self):
+        """The read that the fake pair used to accept must not name a row.
+
+        It shares only "キユ" and "ユピ" with l02's name, both of which every
+        Kewpie row prints. Bounded to the catalog's own vocabulary the read
+        keeps just those two pairs, so it scores the same against every
+        Kewpie row and the margin gate refuses it - the same mechanism that
+        already handles a read of shared brand copy alone.
+        """
+        from identity_lanes import DecisionPolicy, TextLane
+
+        rows = self.ROWS + [{"sku_id": "sku_l02", "product_name": "キューピー アマニ油マヨネーズ 200g"}]
+        read = "キユピアク5C"
+        scores = TextLane.from_catalog(rows, "no-such-dir", ocr_engine=None).scores_from_text(read)
+        ranked = sorted(scores.items(), key=lambda kv: kv[1], reverse=True)
+        self.assertEqual(ranked[0][1], ranked[1][1], "the read cannot tell the Kewpie rows apart")
+        decision = DecisionPolicy().decide([], ranked, text_read=read)
+        self.assertIsNone(decision["best_sku"])
+
+    def test_a_read_of_real_text_still_names_its_row(self):
+        """Bounding the denominator must not cost a correct read its answer.
+
+        This is the facing the strict-read variant broke: l10's own name read
+        with OCR's spacing, which has to clear the accept line by margin.
+        """
+        from identity_lanes import TEXT_ACCEPT, TEXT_MARGIN, TextLane
+
+        rows = self.ROWS + [{"sku_id": "sku_l02", "product_name": "キューピー アマニ油マヨネーズ 200g"}]
+        scores = TextLane.from_catalog(rows, "no-such-dir", ocr_engine=None).scores_from_text(
+            "213日以月A ピュア セレクト マヨネーズ"
+        )
+        ranked = sorted(scores.items(), key=lambda kv: kv[1], reverse=True)
+        self.assertEqual(ranked[0][0], "sku_l10")
+        self.assertGreaterEqual(ranked[0][1], TEXT_ACCEPT)
+        self.assertGreaterEqual(ranked[0][1] - ranked[1][1], TEXT_MARGIN)
+
+    def test_one_shared_pair_is_not_enough_to_name_a_row(self):
+        """A ratio of 1.0 on a single pair is not evidence.
+
+        "XXイス" contains exactly one pair the catalog knows, and the row that
+        contains it scores 1.0 with a full margin over every other row. On
+        image6 that shape named sku_l08 from the read "サソース". The floor
+        asks how much of the read the row actually explains, so one pair is
+        refused while the same read with two is accepted.
+        """
+        from identity_lanes import DecisionPolicy, TextLane
+
+        rows = [
+            {"sku_id": "sku_l08", "product_name": "オイスターソース"},
+            {"sku_id": "sku_l01", "product_name": "キューピー マヨネーズ"},
+        ]
+        lane = TextLane.from_catalog(rows, "no-such-dir", ocr_engine=None)
+
+        thin = sorted(lane.scores_from_text("XXイス").items(), key=lambda kv: kv[1], reverse=True)
+        self.assertEqual(thin[0][1], 1.0, "the ratio alone cannot see the difference")
+        self.assertIsNone(
+            DecisionPolicy(signatures=lane.signatures).decide([], thin, text_read="XXイス")["best_sku"]
+        )
+
+        enough = sorted(lane.scores_from_text("ZZソース").items(), key=lambda kv: kv[1], reverse=True)
+        self.assertEqual(
+            DecisionPolicy(signatures=lane.signatures).decide(
+                [], enough, text_read="ZZソース"
+            )["best_sku"],
+            "sku_l08",
+        )
+
 
 class FakeDetector:
     """Records concurrency and returns fixed boxes."""
diff --git a/recognization/code/test_live.py b/recognization/code/test_live.py
index ecf721e..4357776 100644
--- a/recognization/code/test_live.py
+++ b/recognization/code/test_live.py
@@ -128,11 +128,10 @@ class FakeInventory:
 
     def __init__(self):
         self.products = {
-            "sku_a": {"sku_id": "sku_a", "product_name": "Product sku_a", "price": 150.0,
+            "sku_a": {"sku_id": "sku_a", "product_name": "コクうま カロリーカット65%", "price": 150.0,
                       "number_in": 10, "number_out": 1, "number_on": 9,
                       "receipt_date": "", "expiration_date": "", "local_image_path": None},
-            "other": {"sku_id": "other", "product_name": "Product other", "price": 150.0,
-                      "number_in": 10, "number_out": 1, "number_on": 9,
+            "other": {"sku_id": "other", "product_name": "アマニ油マヨネーズ", "price": 150.0,
                       "receipt_date": "", "expiration_date": "", "local_image_path": None},
         }
 
@@ -266,6 +265,36 @@ class LabelLifecycleTests(unittest.TestCase):
                         == "recognized")
         engine.shutdown()
 
+    def test_a_pan_does_not_let_a_neighbour_inherit(self):
+        """A label must not slide onto whatever moved into its screen position.
+
+        The memory box is stored in the coordinates of the frame it was
+        measured on. Under a pan the shelf slides beneath that box, so the
+        product now occupying the old screen position is a different one.
+        Comparing the raw box hands it the label at IoU 1.0; compensating by
+        the shelf movement drops the overlap to nothing.
+        """
+        session, engine, detector, matcher = make_session()
+        for frame_id in range(1, 5):
+            process(session, frame_id)
+        self.assertTrue(wait_for(lambda: process(session, 5)["tracks"][0]["identity"]["state"]
+                                 == "recognized"))
+        # The product leaves, so its track ages out and the next detection at
+        # that screen position is a new object rather than the same one.
+        detector.boxes = []
+        for frame_id in range(6, 10):
+            process(session, frame_id)
+        # The shelf slides 90 px: the labelled product is now 90 px to the
+        # left, and the screen position it used to occupy holds its neighbour.
+        session._frame_origin = [90.0, 0.0]
+        detector.boxes = [{"id": 0, "box": [100, 100, 200, 260], "confidence": 0.9, "class_id": 0,
+                           "width": 100, "height": 160, "center": [150, 180]}]
+        result = process(session, 10)
+        row = result["tracks"][0]
+        self.assertFalse(row["inherited"],
+                         "the product that slid into the old box is not the labelled one")
+        engine.shutdown()
+
 
 class CosineScaleTests(unittest.TestCase):
     """A gallery-scale score is gated by the gallery, not re-gated by the live path."""