In Andreas 04 the contents of your About page are automatically displayed in the sidebar area (on top of your widgets, spanning the width of both sidebars) as long as the page slug is “about”. Very neat, if you wish to have your bio or an introduction to the blog permanently displayed on your front page: in most themes you would have to click the About tab to access that info; if you wanted it on the blog front, you would have to set your front to display your About page instead of your posts (not good for your traffic) or put the info in a Text widget instead (ok but not as easy to format as a static page).
Unfortunately, the About tab in Andreas 04 shows up in the top menu too (in my opinion, the designer of the theme should have taken care it doesn’t), so if you click the tab you get the same information displayed twice:
Two ways to eliminate that:
a) About info accessed via the header tab, not displayed in the sidebar: change the page slug to anything other than “about”.
b) About info displayed in the sidebar, no tab in the header: make sure the slug is “about” but delete the page title.