Originally Posted by nynaevelan
And now that we have given the grammar lesson, do you have an answer??
I was just kidding, don't take it too seriously
Unfortunately I don't have an answer. I only use collections by authors, so there are no duplicates. I suppose it should do it that way, no reason why it shouldn't. The book can be in different collections by author, tag, and series... You can back up your collections file and try.