Iva,
The game plays and computes your shot results exactly the same regardless of the tier you are in or the clubs you are using. I notice all of your clubs are precision 1 clubs, which by definition means the ball doesn't always go where you want it to. The trade off you enjoy for low precision is high forgiveness which means you can mishit rather wildly at times and see a minimal penalty. However, keep in mind that precision affects every shot, not just the dings. Higher precision clubs will land near their target more often, but the trade-off is a severe mishit penalty.
The real difference between Master and Pro is that you are usually playing high-lofted short irons into greens as a Pro. As a Master you are playing middle to long irons instead. That's a significant change in ball flight and spin behavior, so it will take some time to adjust accordingly.
For the stuttering problem you usually need to clear your browser cache, not
the flash. Only in-game options and basic flash elements are stored in the flash cache. The
majority of the course/game files are saved in your browser cache.