Hawk,
When it's your turn and after the opening festivities with artillery and such are done and you are at the start of your turn,
Go to options on the top menu and then the 3rd choice down; says Backup Saves!? If it's checked, uncheck it.
When you do that only the bte file of your game will be saved not the older.bte and oldest.bte files.
When you are playing a game only use the .bte file and I think that is forced when you pull the turn up, loads automatically in the play engine. Nothing to worry about!
When you are forwarding the file via email after you complete your turn, to your opponent, only forward the .bte file and
NOT the older.bte or oldest.bte file! This is important!
If you have any more problems yell brother!!
Regards and Good Luck!!,
John (Big Ivan)