Negative Timing in High Load and Low RPM areas?????

[BlackGMC]

Why is there negative numbers in the High and Low octane table in the High Load (Grams/Cylinder) and Low RPM areas???? Mainly .56-.72 and < 1000 RPM, is this partially responsible for the off idle bog? I was breifly hitting those cells while I was tuning yesterday when I would punch it for idle..... The BEN correction values for those cells kept wanting me to lean out the mixture in those cells. I have basically removed all the TM except right before the shift points so I don't think it is TM kicking in....

[cmitchell17]

I wouldnt think the engine would be as loaded becuase the converter is still stalling up below 1000rpms, but the timing on trucks does get really negative in thoes cells.