I have tried putting data in all fields - MS, AR, AT, AN, AC, CN, PT, LK, PT2, and LK2, and the data is still getting over written. The only thing I have not tried is making sure it has a photo download into the photo folder, but saying that, what about if a photo is not available.
I have spoken about the problems with the database before, this is an important part of the hobby for me and as it work at the moment makes it very hard work keeping on top of it, especaily when I keep updating the navdata file - only for the data to be over written next time that aircraft is picked up.
Andy