Fix renaming the folder name if the page, in the default language, had a custom slug set in its header

CHANGELOG.md

@@ -4,6 +4,7 @@
 1. [](#bugfix)
     * Fixed cross volume file system operations [#635](https://github.com/getgrav/grav/issues/635)
     * Fix issue with pages folders validation not accepting uppercase letters
+    * Fix renaming the folder name if the page, in the default language, had a custom slug set in its header
 
 # v1.1.12
 ## 12/26/2016

system/src/Grav/Common/Page/Page.php

@@ -1458,8 +1458,11 @@ class Page
     {
         if ($var !== null) {
             $order = !empty($var) ? sprintf('%02d.', (int)$var) : '';
-            $this->folder($order . $this->slug());
+            $this->folder($order . preg_replace(PAGE_ORDER_PREFIX_REGEX, '', $this->folder));
+
+            return $order;
         }
+
         preg_match(PAGE_ORDER_PREFIX_REGEX, $this->folder, $order);
 
         return isset($order[0]) ? $order[0] : false;