P.S. I think your wife's pc is also bottlenecked, cuz there is no way it goes bellow your score lol even with my old before last GPU which was GTX 950 used to score above 70 fps. But hey never mind me, what do i know about life
Yea score will always vary a little. Calculations aren't equal every time.
You say your average is low because of pressing f9 early but that has nothing to do with it. Your max FPS is 140, that's lower than my average where as my max was 252