Due to a snafu with United's online rebooking tool, I got to fly a final time on United's 747 upper deck, before they retire the 747 fleet.
I wanted to extend my trip back to California a couple days, and used united.com to make the change. The website is great for seeing all of the rebooking options, change fee, and fare difference. You can change origin, destination, and dates, and price out the implications of changing each variable. It's quite powerful.
I carefully selected only the return flight to change, leaving my outbound flight unchanged. I went all the way to the last step, clicked confirm change, and got an error message. I considered trying again, but saw that my credit card already had a pending charge, so called the reservations line.
To my shock, the reservations agent told me that I cancelled my outbound flight...