Cooled By Water, I have looked at your pic and looked over my 8RDA+ and measured from each end of the ziff socket to the center of the holes and on my board as near as I call tell they are nuts on.
I have a innovatek rev 3 block that uses the 3 lugs on each side of the zif so it would not present a problem for me. My board came from Mwave and is a rev 1.0 but it has been flawless so far.
It sounds like somthing is goofy with your MB
I am curious to see what the one they send you back measures out like. Let us know how you make out.