Pro site signup same for all sites

So I set up pro sites and put up the sign up form. I assumed it will only work for the main site and the sub-stores will have a normal login so their buyers can sign in and see the bare minimum .. i.e account info and wishlist, etc.

However, I just checked the sign-up page for a sub store and that is getting the pricing table as well.

How do I separate the two sign-ups so main store has its sign-up for blog/store/website and on the individual sub-sites, only the buyers from those shops can register normally.