Sorting Problem

Within my library, I list books that I have multiple copies of separately. So far I haven't had any issues, but within my books and Collection (Boxcar Children).

I have 2 copies of Houseboat Mystery (The Boxcar Children #12). They are not sorting together and I can't figure out why. Any help would be appreciated and thank you in advance.

>1 wd40sw: When you edit the books, look for the field next to the title that has a list of numbers. This is the "sort order" field. Make sure that both of them say "(start)" in that field. My guess is that one of them says "5", and thus is sorting with the "E"s.

>2 norabelle414: Thank you so much that fixed it! I'm a bit obsessive and want everything just so and correct so, it was driving me nuts having like 4 books in-between the same title that should have been sorting together.