Factual error: "Underground" is set in 1857 Georgia, yet the padded baseball glove August Pullman gives to his son is of a type used during the early 20th century. Before 1883 when padded gloves were first manufactured, gloves were either not used by baseball players or railroad brakeman's gloves were used.
The Macon 7 - S1-E1
Continuity mistake: At the party, Suzanna Macon passes her tea cup and saucer to a servant twice.
Continuity mistake: When Ben Pullman finds his mother in the woods, the lantern he is holding is held close to him in the frontal views of him, and in the view from his right rear he is holding the lantern outstretched to his front.
Continuity mistake: Rosalee's knees are above the surface of the water from her left rear as she bathes, but the front views show her knees submerged. It keeps switching back and forth.