The time zone calculation makes sense. But it still leaves me at a loss as to why all of my syncs in California work great, but every time I try to set up a sync with the computer in Tennessee it removes all of the files on both ends of the sync after about 24-48 hours during the first sync. Are there issues that can occur on an individual computer that would cause this sort of behavior? The computer is a Mac laptop (OS 10, but not sure which release), and the folder I'm wanting to sync is on the internal HDD. The sync seems to start fine, but with in a couple of days both sides of the sync start removing files to the archive.