Membership Plugin CSS & Bugs

Hi I've just installed the membership plugin finally, which I was hoping to use as my main registration, but the forms and popup are messy and buggy.
So I'll probably try the Gravity Form workaround if I can.

In meantime, can you help me fix the CSS for the subscription page, see the signup button goes over the border:

You have access through WPDEV if you need it.

The reason I say it's buggy is that when using the normal registration with the popup, after registering the next pop up screen doesn't go away even though you have logged in or registered:

Also can I ask, is any of the text you have in the forms customisable? I want to change the copy that is shown, for instance it repeats Your Subscription under the Subscription title as you see in the first link.