diff --git a/gui/main_window.py b/gui/main_window.py
index 9843f3d..01e8b11 100644
--- a/gui/main_window.py
+++ b/gui/main_window.py
@@ -224,7 +224,11 @@ class MainWindow(QMainWindow):
             self.preview_table.setItem(row, 1, QTableWidgetItem(orig))  # show original until selected
             self.preview_table.setItem(row, 2, QTableWidgetItem(self._ext_for(orig)))
         self.preview_table.setSortingEnabled(True)
-        header.setSortIndicator(sort_section, sort_order)
+        # Actually sort the table (setSortIndicator alone doesn’t); default to File type so episode renumber doesn’t skip
+        if sort_section < 0:
+            sort_section = 2
+            sort_order = Qt.SortOrder.AscendingOrder
+        self.preview_table.sortByColumn(sort_section, sort_order)
 
         # Numbering uses the table’s current (sorted) order, not load order
         order = [self.preview_table.item(r, 0).text() for r in range(self.preview_table.rowCount())]