Product page not displaying products

Hi. I'm new to WPMU.

Just installed MarketPress on my site for ACS (currently under development) http://www.albertacarriagesupply.net/

Anyway, I've added some sample products and assigned them to various categories etc. But I notice that the products page (under ACS Store) doesn't display them. It seems to just display a random image from one of the blog posts. Is this a conflict with the StudioPress theme I'm using?

Also any of the category pages only displays a single item despite multiple items being assigned to each category.

Thanks in advance for any assistance you can provide.

T