Its not a punishment and it's not a bug.
I didn't change it, I can't as a GM and neither can GM-M.P
I can tell you that you are not the first to change his name to "Managed by computerized" kind of name and in general it's not a name that the game allows, there isn't a "Black and white" rule about it.
In case you don't like your new name (I think it's nice...) I suggest you'll select a new "normal" name (As your original name) and I hope someone will change it for you...
"Did you miss me??? - "With every bullet so far..." Al Bundy