I noticed today that all my routes have been duplicated - every route is listed twice with the same name and time stamp. Not the end of the world but a hassle to clean up. Has anyone else had this? Is it maybe something to do with separate devices synching to cloud and SD getting confused about versions?

Maybe the date/time settings on your device are set incorrectly? That might cause SkyDemon to think the version stored locally was different to the one stored in the cloud. Just a thought; I haven't heard of this happening before.