add_meta_box ignoring context??? outputs box in <div id="advanced-sortables" class="meta-box-sortables ui-sortable"> rather than "normal-sortables"

gistfile1.php

<? 
function ebs_seo_cp_add_custom_box_contact() {
    add_meta_box(
        'ebs_seo_cp_meta_box_class_contact', //id
        __( 'Location Details: Contact Information', 'ebs_seo_cp' ), //title
        'ebs_seo_cp_inner_custom_box_contact', //callback
        'location', //post type
  	    'normal' //context
    );    
}
add_action( 'add_meta_boxes', 'ebs_seo_cp_add_custom_box_contact' );

?>