When Sabrina shows a picture of Melissa Rossiter in a folder, the photograph is taken from the next scene in which they meet her at her house.
When Kris is attacked in her apartment, the high-pitch scream is evidently added post-production.
Most recent victim is found buried in sand with hand sticking out, but newspaper photo shows foot sticking out from beneath the sand.
When Melissa Rossiter arrives and enters the carousel room there is a shot of the carousel mirrors. Three mirrors are visible. As Rossiter enters the door, you see her reflection in the center mirror. In the left mirror you can see a blonde female crew member in a grey sweatshirt and black slacks. She turns her head to watch the actress enter.
When the bad guy crashes through Kris' glass doors, instead of running away to safety, she just stands there, waiting for him to get up and regain his footing.