Mine had a gap at the top. I presumed it was from the PO holding on to the handle while going down the steps. I held the bottom and pulled in on the top and torqued the door until the gasket seated evenly along the latch side. I was concerned about breaking a weld on the door, but didn't.
Al and Missy Waschka
2006 F-150 Lariat 4x4 5.4L 3.73 (Buzz)
2001 Safari 25 RB Twin (Slinky Dog)
WBCCI 1322, TAC FL-39, AIR 82265