just called and miraculously got through right away. yeah, they told me that they were unable to change the default date, but just pay on the day i want to pay (e.g., May 17) and even though it will say 'late' payment, it won't be. you cannot pay a non-late payment on the phone, by the way. seems like a very clunky system, and apparently, they were unable to change the due date default last year either (though i got a refund last year so i didn't know or care). thanks.
