i do each of my clutch plate bolts up in a star shape, and do each bolt up like half a turn at a time so the plate is tightened reasonably even. the only reason i can think of is the torque wrench setting is wrong. is it hard to get it to torque?, do really have to lean on the torque wrench?. it sounds like it's too tight to be snapping bolts i'd check out the torque wrench, once the bolts are done up finger tight you should only have to turn the wrench 1/2 a turn.
good luck!