[kube]

Perhaps compare it to the original code in the skin1_original folder and use webmaster to locate the tpl to see what's happening with your skin1 .tpl...

If it's the default bestsellers list that comes with xcart try looking at....
skin1/modules/Bestsellers/menu_bestsellers.tpl

and compare it with original code from skin1_original...
skin1_original/modules/Bestsellers/menu_bestsellers.tpl