I have the Function theme.
On my shop page, I have gotten the layout the way I want. 3 across in a grid on down the page.
I want the same thing to happen on my category pages, but I can't figure out how to force the category pages to use the main shop template. From what I can tell, they should both be using archive-product.php. I've done everything I would think I could do from the admin interface and have been poking around the code, but I haven't seen any results on category pages.