Chapter Two: The Dark Baptism - S1-E2
Continuity mistake: When Sabrina is about to sign the book with her blood, the drop of blood keeps changing where it's at. At first it hits a drawn line, then it's above the drawn line and is right below the last name. In the third shot, there is now a line space between it and the last name in the book. It continues to change depending on the camera angle.
Chapter Six: An Exorcism in Greendale - S1-E6
Continuity mistake: When Lady Blackwood is talking to Zelda about her 2 miscarriages, she only has one hand on her belly, but in the next shot she's using both hands.
Chapter Seven: Feast of Feasts - S1-E7
Continuity mistake: When we first see the men hunting they have rifles with iron sights, after they have shot the deer all of their rifles have scopes on them.