Thread:Project:Support desk/User editing problems/reply

There's indeed something strange in the block log and the blocked users page, since the first one display different usernames, but the latter display only a single user.

Try unblocking all users from here. If it doesn't let you block any more users (probably because all of them target the same user) then try the unblock again, but changing the target user with a number shown here (the value of  in each   line), preceded by the # character (for example, #100).