When Don is teaching Robin Brooks how to play golf, he is wearing his sunglasses during the close up shots. But, when the camera shows a distant shot, he is clearly not wearing them. Then, another close up is seen and he is wearing the sunglasses again.
California law on the disinterment of bodies only allows consent from the surviving spouse, children, parents or siblings. Therefore, Reverend Joseph Ezra would not be allowed to provide consent to exhume Reverend Doran, especially over the stated objection by his widow.
During the conversation between Don & Charlie Epps and Larry Fleinhardt at about the 8-minute mark, the second hand on the clock seen on the wall behind Charlie Epps never moves.