Door Gap for 1932 Cabriolet

[Lincolnville]

I'm seeking to solve the cause of a door gap on my '32 Cabriolet on the driver side.

I'd like to know the distance from the leading edge of the lower hinge on the driver side door to the trailing edge of the door. The distance for the door in the picture is 30" (same door in all pictures) but the distance for another driver side door is 29 1/2". Neither door shows any signs of damage, but when I attach the second door the gap disappears.

Sorry the first picture (6371) is the wrong one. Just posted the correct picture - last picture.