Ticket #8444: 8444.discover-level.diff

template.php

@@ -1564 +1564 @@
         $post = $page;
         setup_postdata($page);
 
+        if ( 0 == $level && (int)$page->post_parent > 0) {
+                //sent level 0 by accident, by default, or because we don't know the actual level
+                $find_main_page = (int)$page->post_parent;
+                while ($find_main_page > 0) {
+                        $level++;
+                        $parent = get_page($find_main_page);
+                        $find_main_page = (int)$parent->post_parent;
+                }
+        }
+
         $page->post_title = wp_specialchars( $page->post_title );
         $pad = str_repeat( '— ', $level );
         $id = (int) $page->ID;