campingman, this is from a retired winnebago dealership service manager, for 25 years, and now, a hwh traveling service tech for 15 years. with jacks, level first, then extend rooms, retract rooms then retract jacks.
if you have air leveling, read the owners manual. use common sense.
every manufacturer has a different technique, that said, having a level coach before extending or retracting a room is always best. you are not moving a square room inside an off square hole.
the main concern is that moving the room while not level may bind, or damage a seal. if you are reasonably level, without leveling, moving the rooms doesnt normally cause any damage. its only in extreme cases that i have seen damaged seals.
if in doubt, call the manufacturer. this forum is a good source of information. most people give basically the same info. some even consult that new unused unread manual in their owners packet.