Ross,
I will make a point of looking at the door more carefully. Thanks for the images and the 'TAB' comment. I would guess that I have to take the body off to see if it is properly set but maybe a close examination without doing that will be enough.
So IF that is the issue, how do I fix it? I'm guessing take off the body and carefully force it in position.
I bought this car at the Fort Pitt train show. It operates well, is perfectly clean, but I know nothing about its history.
As always, thanks - walt