Hi, I just started using Bittorrent Sync to transfer PDFs from my desktop to my iPad. It is a great application, thanks. So on my iPad, I select a pdf to sync, after it has transferred I click it and select 'open in iBooks'. Now I can see it in my iBooks library and read it. When I am finished reading it, if I delete it in iBooks it seems to stay ticked in BT Sync. And if I delete it in BT Sync it seems to stay readable in iBooks. Is it stored twice on my iPad? Do I need to delete it from both BT and iBooks to fully get rid of it off my iPad? Thanks so much