There's only one situation that we are aware of that can cause the unit to be lifted off of the tires:
If the unit is NOSE DOWN excessively with the REAR JACKS EXTENDED to the ground when you start AUTO LEVEL, the system will be forced to raise the front end up to level. This could lift the entire coach off the ground.
After playing with the system today and talking with Lippert, this is the only scenario where we could make the tires come off the ground. The unit needs to be "relatively level" before you drop the rear jacks and engage the AUTO LEVEL. This might require you to manually adjust the front legs some before starting the process (which is covered in the Operation Instructions).
It is entirely possible that the programming needs to be reset to ZERO CALIBRATION, but that sounds unlikely in most instances. However, that process is spelled out in simple step-by-step instructions in the Owner's Manual. Before doing that, we would recommend some technical assistance either thru a dealer or over the phone with a Lippert Technician.
Since we are unable to replicate the issue in any way except for what we described above, we believe this will help in most instances. However, we stand by waiting to provide additional assistance if our feedback doesn't solve the problem.