[Richard]

Jon, has it always done this, or did it behave normally at some previous time?

You haven't changed air bags have you ? A different model air bag side to side would explain what you are seeing. The lifting force being a direct function of the diameter of air bag and the air pressure.

Is it possible the front air bag on the low side is not being inflated? A bad raise solenoid valve on the low side should be checked. Perhaps we are looking at the wrong end.