PHP expert needed....

I have a site that has a couple different membership levels - PHP and MySQL. Registration is handled through Paypal..... All has been working great... I am trying to add a 3rd user type, but it is not adding the proper user type to the database. Each member type has its own set of files, and I have duplicated and made the appropriate changes to reflect the new user type, but I must have missed something because it is adding the wrong user type. I am looking for immediate assistance with this, but it should be a simple fix..... $30 max budget