Pagination links at bottom of page one of the links is always broken.

I noticed this when I set a menu to point to the blog and used the "(Categories) Single Category". and I set the pagination to one post per page then when I go to the blog and look at the bottom "< Previous 1 2 3 4 5 6 7 8 Next>" I see the url generated for "12345678" and one of them is missing a piece.

1 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/0/categories/page-1
2 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/1/page-1
3 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/page-1
4 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/3/page-1
5 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/4/page-1
6 = http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/5/page-2

You can see on the third link the "/2/" is missing between "categories" and "page-1"

Also why is links 1-5 considered page-1 should they not be page-1 page-2 page-3 etc.. since I set it for one post per page.

Also should not the first link be
http://joomla-dev3.userful.ca/blog-virtualization/2/listings/categories/0/page-1
not
http://joomla-dev3.userful.ca/blog-virtualization/2/listings/0/categories/page-1