You mean that wh4en you export your mission to single player missions (or multiplayer) from the editor when you already have one saved with the same name it doesn't save any of the changes you made? Well, I had the same problem, and the only thing you can do -as far as I know- is to delete the mission, the .pbo from the flashpoint/missions folder b4 you run Flashpoint. Then when you export the missions, the changes made on the editor will be saved.