Your average shot up, most likely, because you entered a new tier and initally played rounds that were higher than the average you had in the previous tier. In other words, everything resets.
I've also noticed patterns, although I could be wrong, that suggest playing in mostly Country Club tournaments will not affect your Average Score to the extent regular tournaments will. Keep in mind that CC tournament conditions are set by the creator...so how could that possibly carry as much weight as regular tournaments.
There is not clear indicator of what moves us to another tier anymore. Algorithms take many things into account...so scoring, although important, may not have anymore clout than the amount of time we send here. After all, they are trying to sell balls and equipment (smile).
Joey