Shamrock, if it says your details have already been entered, its more than likely that your password has aswell!
What happens when you enter the first number they gave you and you original password?
I had the same problem later on in the application but when I logged back in the details had been saved even though it had originally said the page could not be displayed.
Im sure they will try and fix some of the bugs in the next day or two.
Good luck