Plot hole: No one wonders what happened to all the staff and patients at that sanatorium? No police ever came there and checked the place out after 30 years? And all the patient records, furniture, etc are still there?
Plot hole: This film takes place in 2003, meaning it takes place right before the original. The cannibals' house in the original looks like its been lived in for years, but this one shows they've been living in the sanitarium.