diff --git a/introspect.py b/introspect.py
index 0ea2a17..76a5ac8 100644
--- a/introspect.py
+++ b/introspect.py
@@ -2039,7 +2039,11 @@ def _discover_submodules_via_dir(mod: ModuleType, parent_name: str) -> list[str]
             # Verify the module actually belongs to this parent
             # (filter out stray re-exports like 'sys', 'os', etc.)
             obj_name = getattr(obj, "__name__", "")
-            if obj_name == submodule_name or obj_name.startswith(parent_name + "."):
+            if (
+                obj_name == submodule_name
+                or obj_name.startswith(parent_name + ".")
+                or obj_name == attr_name
+            ):
                 found.append(submodule_name)
     return found
 
@@ -2442,11 +2446,16 @@ def _rna_struct_to_data(
 
     properties: list[PropertyData] = []
     for prop in getattr(struct_info, "properties", []):
+        prop_type = rna_property_to_type(prop)
+        is_readonly = bool(getattr(prop, "is_readonly", False))
+        # Writable mathutils properties also accept Sequence[float] for assignment
+        if not is_readonly and prop_type in _MATHUTILS_ARRAY_TYPES:
+            prop_type = f"{prop_type} | Sequence[float]"
         properties.append(
             {
                 "name": str(getattr(prop, "identifier", "")),
-                "type": rna_property_to_type(prop),
-                "is_readonly": bool(getattr(prop, "is_readonly", False)),
+                "type": prop_type,
+                "is_readonly": is_readonly,
                 "description": str(getattr(prop, "description", "") or ""),
             }
         )