hit hard bump now car sits too far down???

If you tightened up your LCAs with the weight off the wheels, you locked in stress on the bushings. The impact could have torn a bushing. Not saying you did; just a possibility.

The mention of the torsion bar socket is interesting. Any rust in that area? I've heard of them tearing loose.

A little settling of the suspension is normal. But 2 inches on one side suggests that something is loose or broken.