the internet may be wrong on this
the observation deck is called the 30th floor in provincial docs
video inside the elevator
• Video Link
I don't know if there is a 13th floor or not. I'm assuming there is one with 31 floors.
Machine rooms on top of building should not be counted. It should be ground floor (typically the main entrance to the building) and floors above it. Basements that are partially above ground due to a gradient are still basements.