They are stuck in the pirate ship ? Can you select one of them and try to choose "move here" out of the ship ? If you can "see" them you can try to delete them with moveobjects on and to save. Get out of the lot and return. They should be in front of the beach.
It's a community lot, so there isn't a delete option. If you have the Insimenator you can allow buy and build modes which will allow the "deletion" then.
