category shortcode messes up the layout

If I use the product category shortcode on a page that is not the default shop (so I can split my store up) the layout gets messed up.

The four columns of product are all over the place. I need to get them to act like the css for the default shop page in neat 4 column layout full width.

Here is the page – http://www.emptymindfilms.com/newsite/buy-movie/

Any ideas?

http://wordpress.org/plugins/woocommerce/