Mike take a look at the FAQ and you will find info about tiers. and lots more
You will find the following statement from WGT regarding tier adjustments
"You must play Ranked stroke play rounds or Stroke Play tournament
rounds to change your tier. Our calculation takes your ten best out of
your most recent fourteen scores and applies a weighted index to
determine your tier."
Don't worry, if you are scoring well, your tier will soon change!!! Happy golfing