Possible bug in RotTK 8

You can train your stats up by 10 from their initial value or to 100, whichever is less. If you can get a Red skill, then you can train up another 10 for that stat. The general that I'm playing doesn't have the Fight stat to train up my WAR by an additional points, but I could still train him up 20 points of WAR anyway. Anyone know any reason why I would be able to do this? Thanks,