We are aware of the issue regarding coin rooms counting as ranked games causing some strange averages.
We are already creating a fix for the bug that will stop it from continuing. Once we have the fix it will need to be tested and then there will be a short, I'm told 10-15 minute, downtime to deploy it.
After the issue is fixed we will be assessing further how we remove the scores from averages entirely.
I will update this thread as I learn more.
_CHAMPION
EDIT: Short downtime was to deploy first fix to discontinue the use of coin games as 18-hole ranked rounds.
EDIT 2 7/31: Another short downtime is coming up soon. This will stabilize player's averages. The average changes will first be noticeable in the game client and may take some time for them to show properly on play profile pages.
Edit 3 7/31: Downtime for the fix has been pushed to 10pm pacific time. So look out for a downtime message later.