There is only 1 motor on each side in the Swintek in-wall system that drives a gear on each track thru a long shaft. So if only top or bottom is not fully out or fully retracted then it is likely that there is a broken plastic part called the shoe that forces each bearing block with the gear in it to follow the track so the gear can't skip a tooth in the track, which must have happened for top and bottom to get out of alignment. The track is aluminum so it can be damaged when the gear slips a tooth and tears up the track, but hopefully that has not happened.
You are looking at least 3-4 hours shop labor to resolve, and at least a few hundred dollars for parts. There's some good youtube videos posted by a mobile RV repair guy in the Northwest USA you can check out if you want to really understand the system and what it takes to work on it. Good luck.
Randy - Manhattan, Kansas
2015 Vista 27N
2020 Ford Escape Hybrid