Why does the WP registration link from login go to Membership registration page?

When my users go to http://schoolofbookkeeping.com/affiliates, I've added an explanation on how to register. (not sure why this isn't intuition with your plugin) When they arrive at the login, they click the little tiny "register" under the login box (which I want shut off actually) and it takes them to my membership registration page. Why? How do I get them to become an affiliate only?