Revealing mistake: As Ted is being burnt by the fire, you can see his body trapped underneath the debris. In a side shot of Ted it is very obviously a stunt dummy as the left arm and head stay completely still and the arm remains completely stiff despite hearing screams and shouts from the pain.
Revealing mistake: When there's a fire, Beth is waving her fire extinguishers around, but there's nothing coming out.
Answer: It's been a while, but as I remember it, this is explained better in the book. If I remember it correctly, since the translation program was made by Harry, he subconsciously added a section that simply mistranslated "Harry" to "Jerry". That doesn't mean every H became a J or anything like that. It only affected that word.
Garlonuss ★