desired brake torque vs engine indicated torque reference vs etc torque request.18GT

all PiDs have different readings under key on engine off conditions, is the difference between scheduled torque and engine torque the only thing that needs to be zeroed to reduce wheel torque error or does the difference between etc torque request and engine indicated torque rerference/scheduled torque affect ipc wheel torque error? the car runs great under wot, no knock and afr is on point, yet I get a wrench after a pass and car goes into limp due to ipc wheel torque errors? simply put would a perfectly good tune have torque errors if only the DDemand desired torque was changed? tuning torque tables have been kicking my ass for over 2 months now :confused:.