When Joy is contemplating the sundial, both her and the sundial are in sunlight. While still in sunlight, Phyllis and Reggie walk up, Phyllis says, "I knew we'd find you here," Joy is still in sunlight, as Phyllis and Reggie enter the picture, everything is in shadow and has been for some time.
As Joy talks to her mom, Phyllis, about Reggie's age, her lips say twelve but the audio says eleven.