I dont know why.
Ive noticed with the gamespy When i use it when i exit or not sometimes , there is always a cmd.exe or two , windows dos program running.
Im sure that that is a way for you guys too read the sync files and whatever else you do during the program but im certain it may have an effect on the game , such as this.
Ive also left the game replay which should be enough for the game not too count.