It's strange they sent the hydraulic cylinder to you in uncompressed state...
Our Aframe doesn't have the under bed storage so I can't go out and see it to think it trough. I have an idea of your problem, but to better see what is going on, post a pic or two.
Deb & Gary
2007 Ford E150 cargo van, 2012 Rockwood Premier A126
Everybody needs beauty as well as bread, places to play in and pray in, where Nature may heal and cheer and give strength to body and soul alike._ John Muir