Same for me, very frustrating game sometime (well, more than sometime).
I know most of the shots and distances when i have to hit a shot because of practice but still i can score 10 shots less or more on the same course. I can score 32 for 9 holes or nightmare 64 for 18 holes and next game same course, same wind suddenly a 27 or 54 appears and i play the same way both games. lol
Very, very frustrating.
But like so many other, the good thing for me is i never buy a single pack of balls or clubs with my own money since i'm on wgt.