I've got the same problem. I got 2 players and I don't get upgrades when I train them. I also lost some greens on that.

The problem with the rewards changing from 2 to 3 players probably won't be a bug. I think that this will be the reward system for the 2nd international cup. Now we can also win a jersey from Brasil and we get more tokens when we get to the semi finals. Can any admin confirm this?