Looking into this right now, hope to have more info soon.
There was standing water on the slide topper that I had not removed first. When I tried to bring the slide in, one side was weighted down and it came in crooked, then stopped. I got that corrected when the water weight was removed (with manual reset). Once it was square, it came all the way in manually...but once the stops are set, it seems to revert back to crooked. Only manually will come in square, but stops ever 10" or so.
it almost seems like it remembers that it came in crooked and only wants to do that now, even though I reset the stops. I'll let you know once we have had a chance to diagnose.