Nope - it's just an aged glitch in the counting.
Whoever quits a multiplayer stroke game will "win" because his "quitting" score will be counted.
After several years, there's no hope that this will ever be fixed, but it also has no relevance at all - there's no record of the standings, so the "win" will disappear in Nirvana once the game is over.
Enjoy your own score which will be recorded in your score history, and
Have fun!!