I think Mark and a few others have up-dated the original FSX database, I'll ask them to jump in here.

If you put in the wrong course the computer sees that as a crosswind. I've never seen a large error, but sometimes guys would be off by 10 degrees when setting the course in the 727 or 707 and it was hard to notice looking out the window. Since the newer planes set themselves from the FMS I don't remember any real problems with the auto flight system in those planes.

If the plane is misaligned a great distance to the center line of the runway there must be something bad in the database. Can you take a screen shot at around 500 feet and then 100 feet and post it?

Lou