How did you manage to have the add to cart button in the main page in categories?
I'm not very sure what you are referring to. The link of your demo site does look identical to my http://www.athenscollectibles.info/i...dex&cPath=3_36 page, except that it also lists Featured New Products etc. The same applies to your home page compared to mine.

I may be able to help if you are a little more specific. Καλό απόγευμα και καλές γιορτές.