I think this two shoul be combined, but since it is a very popular book and both have many edition I'm not sure if there's a reason for them to be separated.
Because of the number of editions (over 10,000!) you should send a note to support. The combine function tends to break for us librarians in such cases.
https://www.goodreads.com/book/show/5...
https://www.goodreads.com/book/show/1...