Congrats for arriving at the tips!
DoctorLarry: However, I think we can confirm the effect of WGT tournament performance on tiering up. Today was also the day I got the notice of winning Week 47 9-hole unlimited play and finishing in 3rd in Week 47 9-hole single play - just prior to the notice of tiering up. All three notifications came within seconds.
It confirms our long-time knowledge (and probably a former WGT announcement) that winning credits contributes to the tiering process. Alas, no formula available.
Furthermore, while matchplay wins would drop the average, the credits won won't be visible in that number but lead to offsets like yours.
DoctorLarry: As before, I was not ready to tier up
Yes you are!
Thou shalt not rip off your peers!
DoctorLarry: my average will go to pot!
Shouldn't be a worry of yours - you're good enough, and saturation will take care of that, after a mere 500 rounds ;)