This is a bit of an odd one, but whenever I change my autosave settings, it keeps reverting back once I open up the game. The default settings are autosaving every 4 turns, saving 5 saves. I normally set it to autosave every turn, saving 50 saves. So I go to the CivilizationIV.ini document, change the settings, save, boot up the game, and the settings have reverted themselves. It's not even consistent, sometimes it's okay with me changing the settings like this and keeps going, but eventually it goes back to the default settings on it's own. How do I get it to stop changing on it's own?