membership subscription button for popups

Hi there,

We have a problem with Membership, which we could really do with getting resolved real quick.

The problem is on the registration page where we have our subscription for people to register (Just the default register page).

If we select 'original membership form' then everything is ok, we see the title, description, price and sign up bottom is to the right (as we have always seen it on these forms).

but if we select 'popup registration form' the button is much wider and is to the left covering the price and when clicked moves to the right!!!

You can see the fault here:

Please help asap