On the subject of refereeing/judging blunders affecting rankings, unless you're going to argue corruption (judges knowingly favoring an individual fighter) then ALL fighters are subject to the possibility of judging incompetence. While a fighter may genuinely have been hard done by in terms of judging, I believe this to be relatively rare, and such outliers will smooth out over time.
Goremire's rules for enjoyable MMA forum posting
Rule 1: REMEMBER that you cannot reason someone out of an argument they did not reason themselves into in the first place.
Rule 2: Albert Einstein once wrote a foreword endorsing a book rubbishing the theory of plate tectonics. History proved him wrong. Moral of the story? REMEMBER: We all say stupid stuff sometimes!
Rule 3: NEVER attempt to mediate in a flame-war between GSP and BJ Penn nuthuggers debating GSP/Penn II. It won't end well.