I came to the forums to see if the note duplication issue has been resolved. Doesn't look like it. The timing is not a coincidence — my subscription is coming up for renewal. This note duplication problem has been so disruptive for me that I am canceling. EN, sorry it had to end this way.
Unfortunately, this happens to me when I have only one app open at a time, on my Mac desktop. For my experience, I can firmly rule out the multiple-device cause.