Mine does/did the same thing.
Lube your rails with what ever you want so they slide freely. You have a sigle piston that pushes/pulls the slide in/out and the gear on the shaft is just to keep it timed. By timed I mean going in/out straight. If for some reason it is not even fully extended loosen the gear wheel retaining nut and use a big screw driver or fork tool and turn the gear out to move the slide out. Should take about 10 minutes.
The set up of one piston and not evenly placed on the slide makes for some twisted openings and yes it can jump out of sync.
Our hydraulic ones are still far better than the electric ones with the track on the tops and bottoms..!
Oh and if your sitting for a while in one spot, I was told to move your slides in and out at least once every 4-6 months.
Hope that helps..!
Glen & Robyn (A.K.A. Puff & Crickit) Full Timers..
2006 F350 6.0 with 3.73 gears, 4X4, Extra-Cab Long Box, Oil/Tranny/P.S. Coolers. Coolant filter. SCT Livewire.
2011 Cedar Creek 36RE, Auto levelers + too much to list..!