Actually it wasn't a part of that add_submenu_page code, I found it here:
// Register Sidebar and Define Widgets
if ( function_exists('register_sidebar') ) {
foreach (array(
__('Left Sidebar', 'comicpress'),
__('Right Sidebar', 'comicpress'),
__('Above Header', 'comicpress'),
__('Header', 'comicpress'),
__('Menubar', 'comicpress'),
__('Over Comic', 'comicpress'),
__('Left of Comic', 'comicpress'),
__('Right of Comic', 'comicpress'),
__('Under Comic', 'comicpress'),
__('Over Blog', 'comicpress'),
__('Blog', 'comicpress'),
__('Under Blog', 'comicpress'),
__('DaFooter', 'comicpress')
) as $title) {
register_sidebar(array(
'name'=> $title,
'id' => sanitize_title($title),
'before_widget' => "<div id=\"".'%1$s'."\" class=\"widget ".'%2$s'."\">\r\n<div class=\"widget-head\"></div>\r\n<div class=\"widget-content\">\r\n",
'after_widget' => "</div>\r\n<div class=\"widget-foot\"></div>\r\n</div>\r\n",
'before_title' => "<h2 class=\"widgettitle\">",
'after_title' => "</h2>\r\n"
));
}
}
Basically see 'dafooter' as the last registered ? It's using that in the browsers header as the page title.