If you guys want a sort of 'fix' to the current issue with page 6 for mouths, go to page 7 and click the first mouth on there. Then exit out of the mouth pages, hit the back button once, and then your mouth will be a mouth from page 6. Once you click the mouth to see the page its one, you have access to page 6! You can even flip out of it and back.
Just a tip for those that haven't found a way to access it yet. :D
- Swoosh