Heather Graham witnesses someone being beheaded and gets sprayed with blood. She runs out of the house and there is not a spot of blood on her anywhere.
When Graham's character arrives at 33 High Street, there's a sign on the lawn that clearly reads a much higher number. As she approaches the house, the sign has been removed.
Heather Graham gets her right hand cut by a knife. Later, she holds out her hand to someone and there is not a mark on it.
When Dr.Derby(Heather Graham) is committed in the hospital cell and talking to Dr.Upton (Barbara Crampton),it is shown that she is wearing blue socks along with her hospital gown.She would have been in bare feet because allowing a disturbed patient socks would be considered a potential danger according to hospital policy.