title: Magento: category display wrong order
body: <p>I used magento 1.6.2, I found there were some problems in displaying category in navigation.
  1. I have exchanged the positions of two categories. The category A and B are categories, C is the child of B. I exchanged the postion of A and C in admin page. So A is the child of B now, And I also checked the table of catalog_category_entity, it shows that A'parent is B. But I still find the positons of them in front page do not changed. I have deleted cache and ssl.
  Another problem is added new category does not show on navigation, I have checked:
  isActive is yes, Include in Navigation Menu is yes. But it is useless.</p>
  
  <p>Who know about this?</p>