I think the OP is on bath salts.
So he doesn't think the Frankie/Maynard second fight should have happened? So Maynard undefeated, and a win over Frankie, and he's not allowed to get a title shot because he beat him years back? Does this make any bit of sense?
The rematches are happening because there was a Draw, tons of close fights, and the title has changed hands quite often.
You best believe if Anderson or GSP lost they would get a rematch. Cain is ramatching JDS. Bones is probably going to rematch Machida...going into that weekend they were giving the shot to the guy who looked the best. It would of been a rematch anyway you slice it. Vera, Bader, Shogun, Machida all would of been rematches for Jones. Anderson just rematched Sonnen. GSP has had rematches. Chuck had a bunch of rematches. Faber and Cruz almost went a 3rd time. The flyweights will all rematch eachother.
Not sure why you act like this is uncommon in any other weight class or era. There has always been rematches.