In A problem of forming equal angles in plane geometry I first added the tags "geometry" and "trigonometry" and received 2 points reputation
Later I realised it was not "trigonometry" but "geometric-construction" so corrected it again , another 2 reputation.
I first thought it was a bug, but then saw that there is no limit to the amount of reputation that you can get this way (except as part of the 1000 a day)
Can we make it standard that for a second revision of a question no reputation is granted (and maybe that a reviewer can override this limit)
PS This question is almost the same as http://meta.math.stackexchange.com/questions/12525/undeserved-reputation but now as a feature request (I wanted to edit that question and add the feature request tag but was not allowed to do so) (why???)