I have taken the whole thing off and found that when they put on the tow hitch it was mounted in a way that pushed the center of the bumper up. Really no fix except to take off the hitch or get one of your AWESOME looking bumpers.
I just bought a 97 and am really amazed at how great your rear bumper is designed!!!! If you make a front bumper I'm sure they will sell like hotcakes as I'm sure the rear one will. Put me down for one rear bumper please.