diff --git a/classifier/js/classify.js b/classifier/js/classify.js
index 161bed2..63381c3 100644
--- a/classifier/js/classify.js
+++ b/classifier/js/classify.js
@@ -467,12 +467,18 @@
     function parseFolderLevels(name) {
         var s = String(name == null ? '' : name).trim();
         if (!s) return [];
-        var segs = s.split('-');
-        var last = segs.pop();
-        var u = last.indexOf('_');
-        if (u >= 0) { segs.push(last.slice(0, u)); segs.push(last.slice(u + 1)); }
-        else { segs.push(last); }
-        return segs.map(function (x) { return x.trim(); }).filter(Boolean);
+        var u = s.indexOf('_');   // the "_" separates the tracking number from the leaf
+        if (u < 0) {
+            // No "_" → a pure tracking-number path: nest by "-".
+            return s.split('-').map(function (x) { return x.trim(); }).filter(Boolean);
+        }
+        // Tracking number (before "_") nests by "-"; everything AFTER the "_" is
+        // ONE leaf, kept whole — the revision may itself contain hyphens, e.g. a
+        // date revision "2025-11-17 (IFI)".
+        var segs = s.slice(0, u).split('-').map(function (x) { return x.trim(); }).filter(Boolean);
+        var leaf = s.slice(u + 1).trim();
+        if (leaf) segs.push(leaf);
+        return segs;
     }
     // Children array for a tracking node (or the roots for null), or null.
     function trackingChildren(parentId) {
diff --git a/tests/classify.spec.js b/tests/classify.spec.js
index 980e958..a26b5b8 100644
--- a/tests/classify.spec.js
+++ b/tests/classify.spec.js
@@ -595,12 +595,15 @@ test('parseFolderLevels: split by - then a final _ into nested levels', async ({
             full: c.parseFolderLevels('BMB-187023-PM-MOM-0001_A (IFR)'),
             leafOnly: c.parseFolderLevels('A (IFR)'),
             noRev: c.parseFolderLevels('CPO-0001'),
+            dateRev: c.parseFolderLevels('LKU-123456-PM-SCH-0001_2025-11-17 (IFI)'),
         };
     });
     expect(r.three).toEqual(['CPO', '0001', '0 (IFU)']);
     expect(r.full).toEqual(['BMB', '187023', 'PM', 'MOM', '0001', 'A (IFR)']);
     expect(r.leafOnly).toEqual(['A (IFR)']);
     expect(r.noRev).toEqual(['CPO', '0001']);
+    // A date revision after "_" stays one leaf — its hyphens are NOT split.
+    expect(r.dateRev).toEqual(['LKU', '123456', 'PM', 'SCH', '0001', '2025-11-17 (IFI)']);
 });
 
 test('add-folder builds a nested chain sharing common ancestors', async ({ page }) => {