diff --git a/src/AcDream.App/UI/Layout/DatWidgetFactory.cs b/src/AcDream.App/UI/Layout/DatWidgetFactory.cs
index e8791e44..15ba9a85 100644
--- a/src/AcDream.App/UI/Layout/DatWidgetFactory.cs
+++ b/src/AcDream.App/UI/Layout/DatWidgetFactory.cs
@@ -115,6 +115,9 @@ public static class DatWidgetFactory
             .OrderBy(c => c.ReadOrder)
             .ToList();
 
+        if (containers.Count != 2)
+            Console.WriteLine($"[D.2b] meter 0x{info.Id:X8}: {containers.Count} Type-3 slice containers (expected 2) — bars may render as solid-color fallback.");
+
         if (containers.Count >= 1)
         {
             var (l, t, r) = SliceIds(containers[0]);
@@ -150,17 +153,17 @@ public static class DatWidgetFactory
     {
         // Only children that have a non-zero DirectState image are slice candidates.
         // The expand-detail overlay has NO DirectState entry, so it's excluded here.
+        // Project the File during filtering to avoid a second TryGetValue lookup.
+        // Stable sort: on an X tie, original Children insertion order (dat key-sort order) wins.
         var slices = container.Children
             .Where(c => c.StateMedia.TryGetValue("", out var med) && med.File != 0)
-            .OrderBy(c => c.X)
+            .Select(c => (c.X, File: c.StateMedia[""].File))
+            .OrderBy(t => t.X)
             .ToList();
 
-        static uint File(ElementInfo e)
-            => e.StateMedia.TryGetValue("", out var med) ? med.File : 0u;
-
-        uint left  = slices.Count > 0 ? File(slices[0]) : 0u;
-        uint tile  = slices.Count > 1 ? File(slices[1]) : 0u;
-        uint right = slices.Count > 2 ? File(slices[2]) : 0u;
+        uint left  = slices.Count > 0 ? slices[0].File : 0u;
+        uint tile  = slices.Count > 1 ? slices[1].File : 0u;
+        uint right = slices.Count > 2 ? slices[2].File : 0u;
 
         return (left, tile, right);
     }
diff --git a/tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs b/tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs
index 6a1ef9c1..4258d0b6 100644
--- a/tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs
+++ b/tests/AcDream.App.Tests/UI/Layout/DatWidgetFactoryTests.cs
@@ -108,5 +108,8 @@ public class DatWidgetFactoryTests
         Assert.Equal(FrontL, m.FrontLeft);
         Assert.Equal(FrontT, m.FrontTile);
         Assert.Equal(FrontR, m.FrontRight);
+        // Overlay (ShowDetail-only, no DirectState "") must not leak into any slice slot.
+        Assert.NotEqual(OverlayFile, m.FrontRight);
+        Assert.NotEqual(OverlayFile, m.FrontTile);
     }
 }