I think I agree with you Lee. The area on mine that is not flush is the thin portion of the "doll's head" of the plate. It is mostly milled out on the back side at that location. Maybe it got dropped, maybe prying did it, maybe ????.....
Now that I have gone around the full edge of the plate, I see that it has been mangled on both long sides plus the burr I already removed from the "doll's head". There are gouges that look suspiciously like the width of a screw driver blade that wasn't quite as wide as the floor plate screw slots that are also buggered.
I am getting picky. The darn thing is flush everywhere but that short length. It is noticeable and will catch a fingernail run across that spot. I keep thinking of smacking it with a chunk of lead
Cheers,
Jack