Pro Site checkout page not showing details

Hey!
Checked the forums but was unable to find a solution.
I have a pro site setup with 1 level.
when testing new user sign up, the CC fields appear below the pricing table. after entering the CC details the page just refreshes and does not show fields for creating user and site names.
Thanks!

Both users and sites can be registered: checked
Sign up at Checkout: checked
users can register multiple blogs: checked