I literally booked the package you're talking about last night, it saved me $750 compared to the AAA rate for the same room and a CM discount for my tickets for the same date. Insane.
The rate you are quoted is the all-in price. That includes tax and resort fees. There IS a refundable option that raises the price a bit but the ticket portion is NOT refundable. If you do need to cancel you'll just have the cost of your tickets available with Disney for the next time you want to purchase tickets.
This morning we got an email with the Disney reservation number that you can plug into
MDE. I was told by someone else in the Swan/Dolphin thread that in a few days they will send another email with the ticket number that you can link to MDE to make your park pass reservations.
This is far and away the best Swan/Dolphin deal out there.