I didn't understand the following sentence from Chip Hyde trim chart :
"What happens is the fin moves to the opposite side when inverted but the engine and prop don't know it, so the plane starts to yaw really bad due to spiraling slip stream."

is there diffrence how the airplane acting between normal to inverted filght at idle ? i meam of course that if it's normal idle flight then the nose will pull to the right, and if it's inverted then the nose will pull to the left.
but what i have noticed is that when it's inverted the pull to the left is much more significant and i wonder what is the reason of that ?