The post associated with a page number changes each time I create a new post. Can this be changed so a page number is permanently linked to a specific post?

For example, this link is associated with different posts as I add posts:

http://www.virdriver.com/prd/2009/08/page/2/

It is a problem because Google indexed this page based on one post, but it no longer points to that post.

I appreciate any thoughts.

P.S. I have permalinks set to use /%category%/%postname%/ Custom Structure. Google seems to ignore this even though all the internal site links use this structure.