Registration creates user but not a member. Please help.

When a new user comes to my buddypress site, they create an account at a page I created called /registration/

Once they fill out the profile information on that page, they enter the captcha and it takes them to a page where they have to hit the subscribe button. I selected "Enable incomplete signup accounts" in case they do not click it. The free membership subscription is active and public. User Registration is set to the free membership. The membership level is active.

However, whether they click it or not... they're not showing up as a member, or even a subscriber.

I'm following the quick start, step by step, but I guess I'm missing something. Please help!

site is at p r p r o f i l e dot com