I think you do not understand me, because I use the Google translator. I had 11552 extra lines in the table xf_user_authenticate even before I cleared the table xf_users.
Imagine, I did not clean the table at all. I have 26,000 applications for registration confirmation. 1448 users. and 11552 extra lines in the table xf_user_authenticate.
What do you say now?
I think these lines are created if enabled confirmation of registration. And it is not removed then. I think this is a bug.