Sorry I don't get that - Srixons to a Max ball - to me thats like driving a Porche and reverting to Trabant speed wise. Try something inbetween that will slow the meter down a bit, For me the max balls are just too slow and I always click early.
But for the meter to go crazy sounds odd so you need to do some maintenance your end. Did you clear your flash cache after changing equipment?
Also quite amusing to blame WGT trying to ruin your rounds - a quick look at your score history shows a very constant score pattern, but perhaps WGT are targetting you (paranoid now?).