Books Marked as Duplicates that aren't

I have several books that Librarything marks as duplicates when they are not. This generally happens when I have a novel and a play or screenplay of that novel by the same name but not necessarily by the same author. How can one disabuse LT of this narrow-minded notion?

They've been automatically combined because the title and author, at least in the cases I saw in your library, are identical. (I didn't actually see any cases of different authors but the same titles being combined in your library, but I may have missed them.) You'd need to change the author of the screenplay to something other than the author of the book (preferred), or, when the author also wrote the screenplay, add "screenplay" to the title, set off by parentheses or square brackets. (Square brackets have long been the standard. Recently there's some concern about how they interact with Touchstones in Talk, but people touchstone non-books rarely enough that I don't think that's a real issue. You can always link directly if you want to direct people to the screenplay.)

Since these have already been automatically combined, after you've adjusted your records to differentiate the author or title, you can separate them, or post on Combiners and ask someone to separate them.