You can add this to your functions.php file –
/** Reposition the breadcrumbs */
remove_action( 'genesis_before_loop', 'genesis_do_breadcrumbs' );
add_action( 'genesis_before_content', 'genesis_do_breadcrumbs' );
That will reposition the breadcrumbs to show up in the same spot everytime, including the portfolio page. For more code snippets like this, you can take a look at the StudioPress code snippet page – http://my.studiopress.com/snippets