One of the first mod's I did to my original door was replace the two hex bolts that were suppose to be hinges with a single rod that passed thru both arms of the door and both supports attached to the stove. Having one pivot point took all of the vertical wobble out of the door and seemed to help the door seal material hold up better. The only way I know to adjust is get a long cresent wrench out (I used a 24-inch'r) and bend the tabs and latch assembly attached to the stove up or down as necessary. There is no way I know of to adjust the door horizontal unless you make some major modifications.
This year, I built a whole new door, beefed up the hinge pins, made the door so it could be adjusted to center/fit the frame, and upgraded the seal around the perimeter to 1-inch silicone covered rope. New door works like a charm, really glad I made the change. I have had zero problems since the new door was installed.