My guess is you have pressure where it shouldn't be. I experienced the bathroom door way out of line once. I retracted all the stabilizer jacks off the ground and the door was lined up perfectly again.
Is the trailer sitting relatively level? What is the pad made out of that the trailer is sitting on? Is the pad smooth and relatively level? Is the pad sloped one way or the other? What is touching the ground? Are any stabilizer jacks touching or only the tires and tongue jack? If the stabilizers are touching try retracting them all and then check the door again.