It works that way by design. You have multiple ways to get back to the front page (1) click the Site namein the header (2) click the 'home' icon in the bar just below the header (3) use the back arrows on your browser.
However, if you feel you need it in the menu you have two options:
1) use a custom menu (dashboard->appearances->menus - build a menu and select Theme locations 'Menu 1'
2) edit the code
edit montezuma/includes/menu.php and change lines 38-41 from
HTML Code:
// If the front page is a page, add it to the exclude list
if( get_option( 'show_on_front' ) == 'page' ) {
$args['exclude'] = get_option( 'page_on_front' );
}
to
HTML Code:
// If the front page is a page, add it to the exclude list
// if( get_option( 'show_on_front' ) == 'page' ) {
// $args['exclude'] = get_option( 'page_on_front' );
// }
if you choose to edit the code remember you will need to do it each time there is an upgrade.
If you can come up with a reallly good argument that is should be in the menu, I'll pass it on to Flynn and see what his take is and maybe it will be changed.