when creating a user, the system creates 2 users in the /etc/passwd file, when both are identical, except of having a dash instead of an 'at' sign.
This is a very odd behavior, that started a while ago (older users are proper).
Another side effect, was that some of the aliases that were directing to proper addresses, changed to direct to the 2nd user. This was MOST troubling to find out.
Does anyone have any clue as for the possible reason for such behavior?