Yes I know that. But we also need to be fair to the Batter/Runner...who was obstructed on their way to third, and ended up having to go back to second. I cant put 2 runners on third base now.
I realize that it does go against the defense there, BUT we also need to take into consideration..the other part of the rule..if that runner wouldnt have been obstucted....batter runner would be on third and a run woulda scored in our judgement.