I’m filing this as a feature request because I assume that the current behavior is intentional, but I’ve recently discovered that if I add the paperback edition of a book from Amazon and then later add the hardcover I end up with two entries in Paperpile. I assume the same thing happens for Kindle editions? (The book in question doesn’t have a Kindle edition so I didn’t test.)
Personally I don’t really want to have separate entries for each edition - I just end up in different places depending on how I get there (via Google or friend’s link on Twitter, etc.) and I would rather only have the book listed once in Paperpile.