diff --git a/docs/framey-loader.md b/docs/framey-loader.md
index ce9878b..76c1119 100644
--- a/docs/framey-loader.md
+++ b/docs/framey-loader.md
@@ -82,7 +82,10 @@ The in-headset **Open official store** view loads the full official catalogue.
 Search matches names, authors, and descriptions. Filters show non-root plugins
 or installed plugins, and Previous/Next buttons browse 20 results per page.
 The root label is a compatibility warning; other APIs are checked only when a
-plugin is opened. The store still needs the managed Decky user service running
+plugin is opened. Both `root` and `_root`
+store tags mark a plugin as needing root, and duplicate store IDs are omitted
+because an ID alone could select a different archive than the visible row.
+The store still needs the managed Decky user service running
 before its Install or Update buttons are enabled. If a plugin prevents Decky
 from starting, Remove remains available for Frame Control-owned plugins while
 the managed service is stopped; it does not restart the service.
diff --git a/tests/test_frame_decky_store.py b/tests/test_frame_decky_store.py
index 7108835..7824bac 100644
--- a/tests/test_frame_decky_store.py
+++ b/tests/test_frame_decky_store.py
@@ -41,6 +41,15 @@ class ArchiveTests(unittest.TestCase):
         with patch.object(frame_decky_store.urllib.request, 'urlopen', return_value=io.BytesIO(json.dumps(records).encode())):
             self.assertEqual([(p['id'], p['author']) for p in frame_decky_store.catalog()], [(42, 'Panel Author')])
 
+    def test_catalog_marks_underscore_root_and_omits_ambiguous_store_ids(self):
+        records = [{'id': 42, 'name': 'Needs root', 'tags': ['_root'],
+                    'versions': [{'name': '1.0', 'hash': 'a' * 64}]},
+                   {'id': 43, 'name': 'First', 'versions': [{'name': '1.0', 'hash': 'b' * 64}]},
+                   {'id': 43, 'name': 'Second', 'versions': [{'name': '2.0', 'hash': 'c' * 64}]}]
+        with patch.object(frame_decky_store.urllib.request, 'urlopen',
+                          return_value=io.BytesIO(json.dumps(records).encode())):
+            self.assertEqual([(p['id'], p['root']) for p in frame_decky_store.catalog()], [(42, True)])
+
     def test_accepts_hashed_non_root_archive(self):
         data, digest = archive()
         self.assertEqual(frame_decky_store.archive_info(data, digest, 'Example'), 'Example')
diff --git a/ui/frame_decky_store.py b/ui/frame_decky_store.py
index 2abf75a..437bb4d 100644
--- a/ui/frame_decky_store.py
+++ b/ui/frame_decky_store.py
@@ -59,8 +59,13 @@ def catalog():
                        'description': str(item.get('description') or '')[:300],
                        'author': author[:100],
                        'version': latest['name'][:40], 'sha256': latest['hash'],
-                       'root': 'root' in tags})
-    return result
+                       'root': 'root' in tags or '_root' in tags})
+    # A repeated store ID makes a clicked row ambiguous: change() resolves by ID
+    # and could install a different archive than the one the user reviewed.
+    counts = {}
+    for item in result:
+        counts[item['id']] = counts.get(item['id'], 0) + 1
+    return [item for item in result if counts[item['id']] == 1]
 
 
 def archive_info(data, expected_hash, expected_name):