No way this is right.
But it is.
When you unhook, the RV is tilting (left) more than the system allows. But because all you did was run the front lacks down, it won't take the lean limit into consideration (else you would not be able to unhook). Extending the left legs invokes the leveling circuitry which know you are exceeding the lean limit, but since you are extending the left leg, the lean angle will be reduced to an acceptable value.
When you come back and retract the left side, the circuitry recognizes when you hit the lean limit and stops with the message you saw.
Hitting the Auto Retract All function should only be done when you are attached to the TV. It does exactly what the name implies. Just be glad you have the TV clear of the RV as it would have dented something for sure.
The better procedure is to extend the front jacks enough to disconnect from the truck. Then use "Auto Level" function to level the RV. Now when you return to the storage lot, all you have to do is hit the left & right buttons to return to the point where you disconnected, hook up, and then hit the "Auto retract all" button. This way the circuitry will handle the lean limit by itself and not issue ugly messages.