You can't explain it with saturation.
Whether saturated or not, the ave. won't go up from a score below the average itself: 28=56 vs. 62.x This in itself is impossible.
There may be side effects from former RGs which have come to be payed out, alas only reducing the average.
Sometimes it depends on where you look at the average: The main screen may be delayed against the game window.
I'm afraid to see no logic in the numbers, much less in the conclusions.
Edit: scratched my errors.