I've had this set for a very long time, I haven't changed it any time recently. What I am saying is that what it is set to is not working, it is reverting to my user ID. At least that is how it appears, as the comments are showing up under my name.
The hole is not the orphan control, it's that I can't get to a list of discussions and comments attributed to my user name (or any other user) in one place and edit or modify them as the administrator to the correct user. If I notice this is wrong, I can't fix it in any way other than navigating slowly and painfully through the front end one at a time, which is impossibly tedious with more than 10,000 active users on a busy site.