Member registration

I have an issue the in when a person registers, I don't get an email and they cant confirm membership. I turned e-mail notification off and set to allow automatic approval. But, when I create an account, it doesn't log in, and the membership does not show up. When I recreate it, it says the name, eamil, etc, already exists, but no member is visible. In the site admin it doesn't show any pending mambers ar approvals. Any ideas?