Hi,
I found a little bug in the options page addon. Not very dramatically.
Maybe you fixed it already, take a look at line #275:
$child_page = add_submenu_page( $page['parent'], $page['menu'], $page['title'], $page['capability'], $page['slug'], array($this, 'html'));
You reversed page title and menu title. The page title should be the second, and the menu title the third parameter of add_submenu_page.
Best,
Markus