The online customer module in admin section is only capable of capturing the pages that are available in the project but dynamic pages or in order words not those urls that are generated by url re-writing.

For example:

Let's say if website visitor is visiting news section or to be precise a specific news topic

But online customer modules only tells the administrator that a visitor visited this location:

Guest    70.131.170.1    United States    8:27:07 PM    8:28:42 PM    http://website/news.aspx

and it never gives specific location like this:

http://website.com/news/8-new-product-launch.aspx

Same with forums also, the online customer modules is not able to track dynamically generated urls like:

http://website.com/boards/t/21/product-discussion.aspx

rather than tracking the exact url location, it only gives this details http://website.com/boards/topic.aspx

Same with Blog section also (wherever the urls are dynamically generated by url re-writing, online customer module is not able to track any of those urls)