I contacted the Schwintek Tech Dept... and was told that this condition was not as it should be. And in order to correct this condition, the slide motor would have be disconnected from the track and and then both slide tracks re-set on the motor correctly.
However, I admit that NOT docking the RV with a slight left low and rear low tilt in rainy weather may lead to a leak at the bottom of the slide. And after intense sustained rain, I've had the right side RV wheels sink into the ground just enough to subtily tilt the rig the wrong way. Agh!