Continuity mistake: The closeup of Herman's flattened tire on the Dragula shows it resting on a dirt and gravel surface, but as Herman begins to effect repair of the tire it is now resting on a grassy surface.
Continuity mistake: As Lily reads the will to the family, the envelope the will arrived in switches from being held by her at the top of the letter to the bottom of the letter.
Continuity mistake: The close up shot of Herman's hand shows him removing his hand after activating the switch to the secret passage, but the long shot of him and Grandpa shows his hand still on the switch.
Continuity mistake: When Lily is introducing Marilyn to Cousin Grace, Grace's hand holds a biscuit in her hand which changes position as the scene cuts.
Continuity mistake: Lily's hand is close to Grandpa's left hand in the long view of it growing fur in the long shot, but the close up shot of Grandpa's hand does not show her hand near his.
Continuity mistake: Lady Effigie's left hand holding the envelope changes position as the shot changes from a long shot to a close up view.
Continuity mistake: When Lily is riding her horse alongside Herman in the Dragula, the background terrain changes whether the scene is a close up of Herman or a long shot of him.
Continuity mistake: The oil slick dumped on to the race track by the bad guys disappears after Herman crashes the Dragula into the fence.
Continuity mistake: The huge gash in the left rear tire of the Dragula Herman repairs with his scarf and piece of tape disappears the rest of the race.
