[Zubersoft]

Off is the default behavior. I'm guessing installing an update must have toggled it on. There is some weird kind of issue with Google's preference framework that can rarely cause settings to be changed as a result of installing an update. I've never been able to reproduce it myself and it's hard to determine how many users are impacted it. If you haven't made too many changes, you can go to Settings->Backup and Restore->Restore Automatic Database Backup and revert the library to an earlier version which would fix the page orders that were modified. I may consider looking into a different way to save application settings in the future as it seems crazy to me that settings can change like that. 

As far as detecting if a file has been changed, MobileSheets just looks at last modified timestamp of the file versus what has been saved in the database. If the two timestamps are different, that triggers the logic to scan for any changes in the file. 

Mike