Ok so I am working on making my site on e107 v2. I'm trying to make all of the pages for my content categorized into book chapters, which means I'll have plenty of books and chapters to deal with but at least everything will be categorized and easy to find.
The problem is, the dropdown list to choose book chapters when making the page (and if you try to change it later) only shows so many chapters and not all of them... How can I correct this?
Attached screenshot showing the dropdown list:

That is all of the book chapters it shows.

As seen in the above screenshot, that is not all of the book/chapters I have. I need that dropdown list to show them all.
Thanks, in advance.