Evernote made 6 copies of one of my notes on October 21 while using desktop version 7.14. First I noticed there were 4 copies, then I shut down the app, checked on my iPhone (which had been running), and saw the duplicates there and did not edit any of them. I then shut down the iPhone app, reopened the desktop app, and as it opened it made 2 more copies.
In my experience this is not specific to the new desktop version and is not the result of editing simultaneously on the desktop and the phone.