I found out more about my pocket door. The hardware for mine is by Johnsonhardare.com. The door can (I think) be easily lowered and then adjusted to hang straight. There is a white nylon catch that goes around a post that locks the door to each roller carriage. The nylon catch can be rotated slightly with a screwdriver, then the door lowered and the door "pegs" adjusted, and then re-attached to the roller carriages. Here is a diagram
of the hardware I think is in my trailer. By the time I found the diagram, I had already put the trailer back into storage so I can't say for sure, but it sure looks like what my door hardware looked like.
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch