Other mistake: At the hospital Laurie could not know that Myers was after her in there.
Other mistake: After Myers stabs the blonde nurse the scalpel is clean of blood.
Other mistake: Myers gets shot 6 times in the chest and body but has no blood or bullet holes.
Continuity mistake: At the beginning of the movie, the front door lights on the Doyle house are on, then off, then on again in just a few different shots.
Answer: From what I have read: yes.
Alan Keddie