Sandi, I bought a scrapbook and two packs of refills last week at the grand opening of Hobby Lobby in my town. All scrapbooks and refills were 1/2 price, yeah!! Anyway I took the pages out of the new scrapbook and they fit the WDW scrapbook perfectly. Then I just replaced the pages in the new scrapbook with the refill packs. Like you said in your post only two extender posts were included with the three ring pages, go figure.
Thanks
Vickey