Alex's doppelganger discusses the novel "Dracula" with his teacher 'Mr. Maloney', but the credits list the teacher as 'Mr. Watt'.
The opening credits list Bill Switzer ('Philthy') while not listing Jessica Harvey ('Jennie'). Both names appear in the closing credits, but it's 'Jennie' who has featured scenes in the story while 'Philthy' doesn't appear anywhere at all.