Couple Blogging Questions

URL: http://armourmarketing.com/blog/

If a user clicks my 'View Blog' page, they are taken to all of my blog posts, in several pages. In the number of page display in the bottom right corner, it has some strange text: http://screencast.com/t/thAI3Dtf6a

Second part is in the 'Categories' that I have listed in the left sidebar, if I click on one of those, how do I get it to just show that selected category blog posts?

Third is how can I get more than 5 blog posts on a page. I'd like to have about 15 or so before they page to the next.