You don't have to change it. Type in the same password if you really want.

Of course, if you knew what the password was in the first place, you wouldn't have needed to reset your password...

I can come at this from the other end: part of my consulting deals with end-users on a daily basis, and I've seen even novice users _finally_ starting to use multiple passwords on their own without prompting.

So, it more likely would be a simple case of their forgetting which password they used on that particular system.