OMM's pictures seem to show that it isn't that uncommon, probably a production variance. If it bothers you (it would if it was me, too), take a small rat-tail file and elongate each of the mounting holes a bit so you can rotate it until it's straight- I bet it wouldn't even take 1/4" at the flange to move the front face enough to straighten it out. Nobody will ever know (I won't tell).
