its because their scheduling algorithm just isn't that smart. sometimes they struggle to pair teams up so that all have 10, so they add in games for a random team to bring up the straggler who only has 9. sometimes, these games fall on the same cycle, although i think they've said that is a bug and shouldn't happen. they will change it when you have 2 games in the same cycle if you ticket before it happens, because you can only game plan for one. basically, its just a strange case of the 11 game thing we see from time to time.