Continuity mistake: A man in a beige jacket and blue jeans walks into the crosswalk and crosses the street. As Ally and Ivy enter the crosswalk on the opposite side, the same man passes them in the crosswalk.
Revealing mistake: After Meadow tells Ali about the cult, Ali's phone shows that her phone call to Ivy has been active for 13 seconds, when in reality the call has been active for much longer than that.
Charles (Manson) in Charge - S7-E10
Continuity mistake: Kai applies shaving soap to his whole face, including his upper lip. In the next shot, there is no soap on his upper lip and he puts it on again.
Answer: Moira's ghost form is unique because of the way she was treated when she was alive. To people who do not sexualize her and truly understand and view her for who she really (namely women), she is seen as an older woman. To people who objectify and don't care to see the truth (namely men), they see the young seductive Moria. It's a strong directorial choice to eventually show how Ben Harmen comes to terms with the truth of the house and himself.