Never trust an American publisher?

Well, perhaps that's taking it a bit far.  Nevertheless, one of the week's acquisitions is a US reprint (translation: pirated edition) of a novel from across the Atlantic.  The US publisher, James M. Campbell, assigns the novel to the author of Father Clement--in other words,the Scottish novelist Grace Kennedy.  Yet, as it turns out, Campbell and, later, T. B. Peterson are the only publishers who believe that Grace Kennedy wrote (perpetrated?) the book; everybody else (everybody else across the Atlantic) thinks that the author is Irish novelist Selina Bunbury.  It would be interesting to know how this particular mix-up happened.