Auto Levelers StabilizerJacks: All 4 down when Leveled?

We have Power Gear jacks. Depending on what needs leveling, we may have one jack off the ground. It has been this way since the day we bought it, has persisted each time we use it (every day), has not caused us any problems, and was called 'normal' by the techs at Power Gear.

These are leveling lacks, not stabilizing jacks.

The one most often in the air? Rear passenger. It is also the last one to finish retracting - it is the furthest away from the pump.