I count two trains in the siding. The station house holds 4 - so I believe the car the POV is shot from is number 7?

ie: there are 5 trains on the track. They may not have despatched others because it was a slow day, but i'm pretty sure they load and despatch in pairs, don't they?

Yeah, 1-4 in station, #5 has the camera, #6 is on track but out of shot and #7 is in the maint bay. The abrupt stopping (cause for much laughter at fright night) is due to stacking in the station. From observations on Saturday night, 99% of that time is due to the guests, not the staff. Sure they could walk a bit quicker but most of it was people dicking around trying to put stuff in their little box thing or trying to work out how to use the restraints.