cart going to generic portal template

Hello,

Shouldn't a "buy now" link keep shopper in the Wordpress part of site.

See test purchase in http://dev.collabora365.com/blank

Also note that the icons in "client portal" are tiny. They weren't that way a few days ago. Only change is I installed WHMpress plugin, but just now deactivated with not change. Any ideas how to fix? I can change the css class, etc in that plugin -- what should I call it

Thanks