CowboyTed: I have heard this term many times. Can someone please tell exactly what "saturation" is and is it a reality??
As has been said it is real.
Very roughly; your average at the moment is a real average of all your completed rr's at Legend. When you have played your 501st round at that tier this will no longer be the case. That round will replace your worst score and that process will continue, each score replacing the worst one included in your average, until your average is 60 and you tier up again.
BOP 3 + 5 and custom courses don't count, red tee does.
As it looks like you've been a Legend for a while and have about 50rr's played (a guess-I didn't count them) it's going to be a while until you are saturated.