John should have added I have tried a test tree under instruction from Ancestry. All is good with that one, except that it wont print or generate any reports passed the home person. Have tried several fixes for this too, but nothing working yet. This tree also obtains duplicates after any synch failure.
My initial tree which I have worked on all day, I checked again in FTM for duplicates, as all were cleared before I started and it tells me there are 563.
I have screen copied the complete list and will spend the rest of the day deleting them rather than go the merge route, which I have done so many times, and try synching again after that.