make sure you are not leveling with the stabilizer jacks, these are not meant to lift the trailer off the ground, only to stabilize it. if you use them to lift the trailer you can cause twisting in the frame which would make your doors hard to shut. level left and right by installing wood or leveling blocks under the wheels and level front to back by using your hitch jack. then put the stabilizers down to prevent motion.
Jason & Wendy
2014 Ford F-350 Lariat 6.7L PSD
2015 Keystone Montana 3711FL
B&W Patriot 16K Fifth Wheel Hitch