Let me give some information about favor points that may shead some light on the subject.
Yes Favor points were broken in previous builds, but there were some major fixes a couple of builds ago that fixed most of the problems with favor points. So if you havent played much in the last week and are only looking at games from a month ago, then yes, you will see problems. But going forward Favor points should be working with the exception of a few rules. Here are some of those rules:
1) A game must last more than 5 minutes for Favor Points to be counted (All game types)
2) You must be connected when the game finishes for Favor Points to be counted (All game types)
3) There must be at least 1 human player on each team for Favor Points to be counted (Only Custom Games)