Need a little css help in Marketpress please

Hi there! Frenchie Breadcrumbs rears its head again, and the client has mentioned that the category pages in the shop section are having issues.

Lo and behold, wpmudev helped me fix the main page of the shop, but the edits we made to the code didn't fix the category pages... and no one noticed until today.

In Explorer, please take a look at:

for how it should look, and then look at one of the category pages:

I need the products to be 3 in a row like on the main page, and then there's a couple of products where the button disappears from beneath them. Screenshots are attached for reference. This is way similar to one of the issues we had on the main shop page that Ari helped with, hoping we can figure out the category pages quickly as well.

Thanks in advance!!