Originally Posted by romandesign
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.
So was I, that's what the smiley was for. But back on topic, since the plugin worked so smoothly the first time around, I think I will use the plugin to play around with different scenarios this weekend.