In general, if a book is published "as by uncredited", but we know who the author is and have varianted that book to one with the author credited, then the book shows up once in the actual author's bibliography. This appears to fail, though, if the book in question is a variant of another book. For example, with Elizabeth Lee's summary bibliography, "More Horror Stories" was also released as "The Second Arrow Book Of Horror Stories", as by uncredited. That book has been varianted to "The Second Arrow Book Of Horror Stories" by Elizabeth Lee. But now both titles show up as separate listings in the bibliography, instead of the correct "The Second Arrow Book Of Horror Stories [only as by uncredited]".
Anonymous
My mistake. There was an error in how the titles themselves were entered. This should be deleted, or closed, but I don't know how to do that.
Closing as per Darrah's follow-up.