I am having a hard time figuring out the z-index or issue with my menu in IE7 for http://www.bellasurjewelry.com/

Seems to be working fine for IE8 and FF as well as Chrome, but IE7 is doing something weird. You can only click on the top subcategory. If you try to move to the subcategory below it, it jumps to the next categories subs. (try it...I know it might sound confusing lol).

Any help would be greatly appreciated! Site is almost done except for this and a few other loose ends.