Page flip won't flip on revisit

Here’s the test link:

On this page click the link at the bottom right that will take you to the wedding albums page.
This page loads fine, the page flips…
Then click the weddings link, engagements link, or bridals link. (either one will work)
On either of these pages click on the albums link, this will take you back to the wedding albums page.

Here’s the problem:
On the revisit of the albums page, the page won’t flip.

I can’t figure out why.
Thanks for any help you can offer.