Espionage with MobileMe and Address Book

I have Espionage set up to encrypt Address Book. Since I use MobileMe for syncing, it is set up to auto login on startup, I enter the password and everything is OK. The problem seems to be that the folder(s) is not getting locked properly when I shut down at the end of the day. When I start up the next day, Espionage tells me that the addressbook folder already exists and is not empty (or something to that effect) and so it makes a backup. I noticed that if I manually lock the folder before shutting down, this doesn't happen. Is this the way it's supposed to work? Do I have to manually lock folders before shutting down? Or am I doing something wrong?
Thanks,
John
Thanks,
John