BuddyPress.org

I see the extra links – Advertise Here, Blog, and Connections. Your image points to the Blog link, which is the other one?

Re Blog link:
1. Did you create a page named “Blog” then go to Settings > Reading and select a static front page and then the Blog page for the blog page?
2. Click on the link Blog, then view page source. Check what shows up as the link class (selected or current) beside the Blog link. Or if you have Firebug, inspect Blog link to see the link class.