Prom Night : A goof in the bathroom scene?

A goof in the bathroom scene?

When she goes into the bathroom to take her anxiety meds, she closes the mirrored cabinet door and the killer is behind her. Suddenly she wakes up and it was a dream. Then the scene plays out in real life. But the difference seems to be the door inside the bathroom which has slats in it like the closet doors she hides in later. But when the scene plays out afterward, the door is solid, not having slats. Am I wrong about this?

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