[Mailman-Users] unsubscribe_policy problem?

Hello,

I set up a mailman today and now I have a little problem. I have this corporate mailing list and I have set unsubscribe_policy to yes for that list but still users can unsubscribe via web gui after they have clicked the unsubscribe and confirmed that they really want to unsubscribe via email.

I'm using Mailman 2.1.2... is this a bug or what?

-- Pasi Sjöholm