I have had this issue on two AD trucks. What I did was adjust the striker to allow it to close without having to slam the door to close it. This would give me a gap, leaving the door appearing to not be latched completely (the door still seals fine). After a month or so to allow the seal to crush into shape, I re-adjusted the striker to bring the door into the proper position. Doing it this way allows you to close the door without ever having to slam it shut.
