Theme issues and remove free levels

I have two issues, first we want on the checkout page only to have a free level but nothing more, ideally it will be a registration page where you enter the sites details directly, is there anyway to remove levels altogether?
http://www.buzzr.org/pro-site/?action=new_blog

Also, the themes aren't actually working, you can see a site here: http://sandbox2.buzzr.org/
can you tell me what's wrong with the theme?