How about taking the door pin out, lay it on a hard flat surface, hit
the center of the pin with a hammer. Now you have a bowed pin. Put the
pin back in. The door should should stay closed now. If not, do the
other pin. If that don't suit ya, then straighten the pins.. You are now
back where you started
I do that in order to keep the door from closing by it's self.

Tom.