It seems I am not alone! Synch problems big time and getting more serious over several weeks. I have compacted, split my tree, followed the step by step instructions that Ancestry point you to. Complete synch failures are occurring almost daily which means I have to unlink and relink, for which I now have a routine but the errors and duplicated individuals in my Ancestry tree and my FTM tree are multiplying despite my ongoing checking and correcting. I feel I might be better off wiping my Ancestry and FTM trees, going back to the hard copy data and starting again. It is frustrating when this could be such a valuable tool and I have wasted time battling with a computer program instead of being able to do research.