Prosites Registration Confirmation Not working properly

I have successfully setup the paypal express checkout API and now when I register a new "Test Domain" as if I were a normal customer, once the paypal checkout is complete it redirects me to a page to show my details for the new website. But instead of showing the subdomain/wp-admin login, it shows the primary domain, and the username field is blank too.

Is there a setting in the back I have missed or something as this is becoming quite frustrating.