How can i order my posts by post type?

Here is solution for your prob dude

add_filter( 'posts_request' , 'modify_request' );
function modify_request( $query) {
    global $wpdb;
    if(strstr($query,"post_type IN ('review', 'directory')")){
        $where = str_replace("ORDER BY {$wpdb->posts}.post_date","ORDER BY {$wpdb->posts}.post_type",$query);
    }
    return $where;
}