3D FlipBook - Pages glitch

Hi,

I've created 2 flip books - both are having the same issue. Pages 2&3 show up fine, but when I turn the page to pages 4-7, half of pages 4&6 are page 2. I'm not sure why this is happening. This is the link https://www.abigaildoyle3.com/publications/ . Please let me know what to do.