Addition:
Seems like I was wrong and indeed vimeo displays only one video on page 10 but then more on the following pages.
This could even be a vimeo.com website bug if you ask me.
Usually, when a page has less than the max. allowed amount of items, that is the last page and that's also where most of our crawlers will stop which, in this case, was wrong.
Thanks for finding- and fixing it Jiaz
-psp-