Revealing mistake: The staircase to the second floor bedrooms is awkward, not in proportion to the rest of the house, and usually only the section that is needed for a particular shot is shown (and the section is most likely a replica). In particular, the staircase would be quite steep - and extend well into the attic! - if the upper portion continued at the same grade/angle as the lower steps. The perpendicular entrance is too short and both posts are not always on the floor (one may be at the end of the steps). (00:23:04 - 00:28:12)
Revealing mistake: The way in which the flame from the fallen candle started burning the wall painting of the family, as well as how the fire spread (rather, didn't spread) and looked, reveal the fire was computer-generated, not real. (00:24:23)
Revealing mistake: When Grandpa Paul Rivers (probably a substitute of some kind) was falling (pushed) down the stairs, his body was "floating" and not actually making contact with the steps. (01:33:30)
