If he beat you 9&8 I wouldn't worry about itJust a quick update (before everyone bails out)
I had a chat with the guys who run the Nike tour. He was categorical that 'player has to be responsible for his/her HC. If he had shot 5 under, then he should have played off a lower HC w/o waiting for an official update. So he may be DQed'. The guy was going to call my opponent and investigate. So we shall see.
Given where we both are, I would have conceded the game as I think I have learnt a lot now. However, considering that he may not play future rounds and that he has been playing golf for about 20 year and hence may have know this situation better; makes me rethink the concede.
We will wait & see.