You need to follow the FSM install procedure. L bar on the left side, R on the right side. Front suspension should not be torqued in place while hanging off a lift. The front suspension needs to be at ride height before it is torqued down. If the front suspension is installed correctly and torqued at ride height then the car should not settle.

If you lift the car in the air so the tires are hanging and then drop it on the ground the car will settle since the bushings have been twisted out of shape. Usually you can settle the car by bouncing it a few times.

The torsion bars should not settle. They are just springs. Force equals deflection and all that. The spring rate doesn't change over time, the only thing that moves with time is the rubber bushings in the control arms.

My guess is that your front suspension was torqued with the arms hanging down and now everything is just trying to get back home. Loosen up the lower control arm pivots with the car at ride height and then re-torque them.