I have the Free Standard Dining with a moderate resort bounceback offer from last August. I'm going in December to Coronado Springs. Originally when I booked, it was going to be my DH, sister, and me. In February, I added my mom. Nothing complicated happened from adding her. In May, though, my mom and sister both decided not to go. When I called, it seemed like the CM I was talking to didn't really know what she was doing (rare instance). She had to create a new reservation for us in order to delete my mom and sister, and in doing so, put us on the CURRENT
free dining plan (only the free quick-service dining plan). I knew something was amiss (the pricing did not seem right) and called the next day, and another CM fixed it for me. I guess what I'm trying to say is this: If you change your reservation, be very clear that you need the same package deal you had when you originally booked. They were able to accommodate me, but if I hadn't known any better, I would have gotten a worse deal. Be careful!