Menu on cell phone screen wrong.

I just noticed something regarding my site:

http://www.simultaneouslanguageinterpretation.com

I have my Static Home Page set to:

http://www.simultaneouslanguageinterpretation.com/blog

As you’ll see there, there’s only two Nav Buttons (when viewing the site on a desktop computer). However, when viewing the same site on an iphone4, you go to an entirely different page with an entirely different Nav Menu.

What have I missed? I need the site and nav menus to be the same regardless of what type of device I’m using to view the site.

Thanks,
Kevin