Sounds to me like you have something going on with the SC install itself that's causing your probs. Swapping back the stock flywheel and clutch will certainly not do anything to fix that.
although like others way more skilled than I have agreed with clutch sensor. on one of the forums you mentioned the mech did it 8x. I wonder it the sensor is going bad/needs to have the connections cleaned.
OP you will need to update us when progress/madness is made.
Yeah man... crazy. May have to change to an RST clutch. I have no clue. Will see what dealership says.