TT TOL is how tolerent the gun is of bounce...teh other one, I cant remember either...but that is teh range of teh trigger pull...you want it to see as much of a trigger pull, as it can, to determine, if its been done by you, or bounce. So really short pulls, are harder for the gun to differentiate, between a legitimate pull and bounce.
I think they used to say, around 85% for the range of pull, and then increase or decrease the % to suit.
Any trigger adjustments, will mean you need to reset your TT filters..