had the same problem this week almost 1000 dups. Finally fixed and now i'm trying to sync back with my ancestry tree and its taking FOREVER! Not hopefull for a sucussful sync!
Thank god i made a back up. I just don't want to have to re-upload the tree and resend invites to my private tree. I talked to support, they blamed my iphone app! Really? the only thing I ever us that for is to look at things. i never change from there.
And if it was my app? Why do they have an app if it jacks everything up?
I am very sad!! My whole Christmas vacation has been spent fixing instead of researching!