Other mistake: The catapult on the battlements Jean uses to evict the castle guards is rather curious. First, there is neither a bow nor any torsion to 'power' the weapon, and secondly it just seems to cock itself, right after each shot. All that Jean does is pull the lever and none of her diminutive helpers stand by for any cocking work whenever the catapult arm is shown.
Other mistake: Philip De Guard is the cartoon's layout artist, yet when we see his name in the opening credits, it is spelled "Phillip" instead of the usual "Philip."
Other mistake: During Lady's first night home, there's a shot of the family's clock: the number seven is painted as a six.