That happened to me in September. I went to check in to my first ADR and it wasnt there. I had my ressie numbers with me, and the girl finally found it and then told me, as if I had forgotten "Oh, its not here bc you canceled it!" No, no, I certainly did not. I quickly got on the phone with dining only to find ALL my ressies canceled, and some other strange restraunts booked under my name. Two hours on the phone, standing in the middle of MGM crying, they found out what happened. When I called to double check my reservations before I left, when I hung up, the CM didnt close my account. Another caller called and had the same first name as me and was coming the same week as me. The CM booked all her ressies under my name. The Disney dining went through, saw that I had two dinners on every day, and cancelel all of mine bc they were made first. They must have thought I changed my mind and then forgot to cancel my old ressies. So now I have none, and this other girl will probably never be able to find hers since its under a different phone number and last name. The CM I spoke to was very helpful and personally called each restraunt and convinced them to squeeze us in. I appreciated that, but it was a HUGE hassel, and took a very very long time. Plus, we could tell we were squeezed in. We would get to the restraunt, and there was a random table in the middle of a strange place, and thats were we would be! LoL. What are you gonna do ya know?