BuddyPress.org

I’ve done something similar, however, the user I created I did by using the dashboard feature to create a new user. I could then login as that user. (Wasn’t quite sure what level to give them, mind).

I wonder if it sent you a confirmation email (you, in the user role, not you in the admin role) & your email system spammed it?

Have you tried creating one from the admin dash?