Pardon me, but for Legends, it has always been 500 rounds ;)
AIKAREN: Im a legend [...] and just scorded a -7 on the last 9 on Wolf Creek. Before my round, I had 62.63. After the game it was raised to 62.64! Can anyone explain?
Please tell the absolute scores! You had a 29 which doubles to 58 for average purpose.
There's no explanation whatsoever for that outcome as an isolated event. The average would always drop but that might be covered by rounding.
The following 33 = 66 might be the culprit, if the numbers haven't been updated immediately.
I won't propose that you mixed up the numbers, 62.64 - 62.63....