Happened to us once at Crystal Palace and once at Mama Melroses, with the episodes being probably 7-8 years apart. After waiting a long time, I went to the desk at Crystal Palace and told them we'd been waiting a long time, and they checked and said, "But you've already been seated." Seems another person with the same first name and a party of 3 was seated in our place! At Mama Melroses, the lobby is so small that we were waiting right outside the door and a walk-in heard them say"... party of 5" and just asked what name they had said and then claimed to be me! Same scenario, we wondered what was taking so long and they said, "But your party has already been seated!" Um, no!