Samantha,
think separately of levels and tiers - they aren't related.
Kelly showed you the conditions of tiering up correctly. One addendum: Play on Par3 and Par5 courses does not count in.
Plus, a minor correction: poor scores do not affect the average once the minimum number of scores has been played, and it has no negative effect on tiering up.
Please allow for some open remarks regarding your progress. You have been playing about 70 rounds as a Pro now through one month, and while the first scores and average were 76es, your average has only moved to 74.6. Frankly spoken, this is stagnation.
Do you have an idea why it is this way?
It might be one or more aspects of the game, hitting the ding with driver and irons, short game to the green, putting... Do you need special help in any of these?
There are a few buying tips if you want to spend some credits/money:
- two short wedges (e.g. Ping for 200 crs each) to improve the short game,
- cheap custom balls (e.g. WGT B-ES or Tour SD) to slow down the meter and to improve overall precision.
These help a lot but aren't essential.
Have fun!