embedding through functions.php weird issue

//Address
add_action( 'woo_post_inside_before', 'my_address' );
function my_address() {
    global $post;
if ( is_single() && in_category('listings') ) {
        echo more_fields('address', '<h1>','</h1>');
       }
}

I used this in my functions.php to output my custom field. It outputs as an h1 and is the correct value, however the value is then followed by a “1”. This is true no matter what field I call, they are all followed by a “1”.

Any thoughts on this weirdness