Multiple copies of the same shelves in My Collections.

I've got multiple copies of the same shelves in My Collections on my Aura HD. Some of them contain no books but even though I hold on them and select to delete them they don't delete.

For example, I've put all my Lee Child novels into a Lee Child shelf but it's showing in My Collections three times. It doesn't matter which of the collections I hold on and select to delete, not one of them will delete. I can delete individual books from them so they all say they contain 0 books but I can't delete any of the actual shelves.

Anybody know how to get rid of them all?

Thanks.