Character mistake: During the Nativity play, Pastor Phil says, "Are we ready to see the result of the Immaculate Conception?" The term 'Immaculate Conception' refers to the conception of the Virgin Mary (conceived without Original Sin), not to the conception of Jesus. Furthermore, the Immaculate Conception is a dogma of the Catholic Church, and not something which a Protestant pastor like Phil would believe in.
Character mistake: They are hooking up Brad's father's satellite dish and he falls pulling the TV up to the roof. The cable is connected to the TV. The problem is all dish systems have a box that goes with them. The cable goes from the satellite to the box, then to the TV - not directly to the TV set.