template problem while viewing products..never seen anything like it

[spunky602]

hello... i'm having a really weird problem on my site so i created a new fresh site to test on but i have been out of luck so far
if someone can take a look and point me in the right direction i would really appreciate it
http://www.testsite.f9laat.com

in this test site the problem appears in the "Hand Tools" category
i noticed it happens when the last row of product is full
lets say i set my view to 6 products 3 in each row and i only have 5 products in that category.. in this case everything works normally
but if i add one more product to that category it gets messed up untill i add another one

also it only happens when i use an artisteer template with a flexiblewebdesign vm template