Just bought this camper & need to take it on a long (for me) trip to family reunion. Roof latches for holding door to ceiling were on the floor the first time I tried to close it up. I put them back in the ceiling & now I can't get the door to latch into them. Is there supposed to be a spacer between the ceiling and these metal latches? It seems like the other plastic wing nuts that keep the door closed to the frame don't allow the door to get close enough to the ceiling to be able to turn the button that latches them. I did make sure that the metal plate over the door opening is flush to the wall so it's not that.