WP_Query is ignoring "orderby" and "order"

Here are the PHP args used for the query:

$args = array(
	'post_type'=>'portfolio',
	'posts_per_page' => 9,
	'orderby' => 'title',
	'order' => 'ASC',
	'paged' => $paged
);

$port_posts = new WP_Query( $args );

Running a var dump gives me this query:

var_dump($port_posts->request);

string(243) "SELECT SQL_CALC_FOUND_ROWS  wp_posts.ID FROM wp_posts  WHERE 1=1  AND wp_posts.post_type = 'portfolio' AND (wp_posts.post_status = 'publish' OR wp_posts.post_status = 'private')  ORDER BY wp_posts.menu_order, wp_posts.post_date DESC LIMIT 0, 9"

Looking at the SQL that’s produced above, shows that both the “orderby” and the “order” are ignored completely.

I don’t understand why the orderby gets changed to “wp_posts.menu_order” when it’s clearly set to “title”.

Has anyone else run into this issue? Looking at the codex shows this as possible, so any help would be awesome.

http://codex.wordpress.org/Class_Reference/WP_Query#Order_.26_Orderby_Parameters