Fixes for render AJAX HTMLRender objects

modules/product/classes/Model/Product/Category.php

@@ -24,6 +24,10 @@ class Model_Product_Category extends ORM_OSB {
 		'subcategories'=>array('model'=>'product_category','foreign_key'=>'parent_id','far_key'=>'id'),
 	);
 
+	protected $_sorting = array(
+		'position'=>'ASC',
+	);
+
 	/**
 	 * Return the translated description for a category.
 	 */