First Long Trip Damage Report

I second the levelling comments. I never move the slides unless level. The large main slide, of course, is the most sensitive to a level attitude. If you get one of them off some, you can run in and out a couple times to true itself when you are level. I've also found that keeping the slide seals lubricated and spraying a non sticky silicone spray on the slide tracks seems to help keep things moving easily.

On the one that isn't moving you may have a motor that has become disconnected. I believe someone else on here has experienced that.