Are you sure you don't have the stabilizers set so that the AS is in a bind? The shell is designed to flex and if you have the stabilizers cranked unequally, the door WILL bind. I have gotten a "feel" for the proper stabilizing after some time.
Try releasing the stabilizers completely off the ground and check the door fit.
If that is the issure, when you put down the stabilizers, count the number of degrees of rotation after the foot contacts the ground. Adjust all 4 equally. Note: it really doesn't take a lot of force to stabilize the trailer. I do 3/4 to 1 turn after contacting the ground. If it is soft soil, maybe more like 1.5 turns....then come back around with another 1/2 to 3/4 after a few hours and the feet settle more. I also use "legos" turned upside down on soft soil, and have the "pads" installed on the feet of the jacks.
If that's not the issue, let us know.
"If the women don't find you handsome, they should at least find you handy." - Red Green