Hi pullinup, which game type was this?
I've noticed similar inconsistencies in matchplay, but since it didn't affect the final statement of the winner I did not report it. Anyway, I've seen at least couple of times that the game said that a given player won e.g. 2up whilst it was 1up (or the other way).
Are you sure the 2 masters didn't bail out before the last stroke? I've seen a number play to the final stroke and then leave just prior to the finish.
update on matchplay - I just played one in which we were A/S before the final hole. I lost it, but at the end the game showed both our scores as A/S instead of 1UP/1DN.