Same thing happened here, although the subsequent round I played as a Master in the tourney, under Master conditions, doesn't show up on the leaderboard. My pro score is still listed in the Pro tier, and since my Master score wasn't any better than that, I'm not exactly sure where my Master round ended up?
To hypothesize, if I shoot a better round than my current pro score in the July BB 18-hole Open, (which is presumably my final pro score? my understanding is one can move up tiers but not down?), does that round count in the Master tier or the Pro tier for July? I'll assume you can only win a prize in one tier in any given tournament, and guess that even though you are now playing as a Master, under Master conditions, if you beat your pro score it will update in the Pro tier as opposed to the Master tier in the monthly tournament.
Of course, I could be completely out to lunch, too....
Comments / actual experiences welcomed.