Wouldn't the correct way to phrase it be that currently Mizzou leads the series 56-54-9?
kU won the 1960 game, and the actual record is 56-55-9 in favor of MU, kU vacates the win but it doesn't change the loss. MU doesn't get an extra win. Mizzou's record in the game is 56-55-9 and kansas's record is 54-56-9. I know that's confusing, but am I on the right thinking here?