I created different sizes and everything works as it should but when you click an item you get for example size 10 showing up before size 5 - Why ?

In the option values section of the admin panel i made size 5 number 1 and size 10 is number 7 in the sort order so why does shoe size 10 show up first ?

site is http://www.darkrealmfox.com/catalog and i'm not finished site yet.