this page doesn't have the store order summary on it, can you send the confirm_cart.php and confirm.php files also.
the define button is used to start a new preset not to edit an existing one.
I have logged a bug that there is not a way to edit an existing one, this should be added in a future update.
I am not able to reproduce ythe probelm with the order details. try setting the connection to none, then reselecting the connection, also try Deleting the Dreamweaver Cache file from the users configuration folder: