Not sure what happened, when I picked my team only two others had picked the Giants, I guess somebody who hadn't committed to three teams picked them without looking to see if they were still available. This is my second time in the league, my first time I had the Pirates, Cardinals and Royals. I picked three different teams this time. I don't mind if 5 teams have the Giants.
It wouldn't be a bad idea to limit people from using the same teams more than a couple of times, I would hope people would do that without it having to be a rule. Another idea that might be cool is to do the league with no team limit, let everybody pick the three teams they want.