Heavyweight Passenger B & O Pullman Loch Ness

[my86tc]

I just purchased 3 heavyweight train cars.  All are B & O.  The Train Combine, The Passenger Loch Ness and the Observation car.  The Combine and Observation cars, ALL the windows light up, but the passenger car
only the middle 2 windows light up.  Is this normal?

[WGL]

  My Spectrum heavyweight coach has most of its windows lit, but my Pullman sleeper has only the two middle windows lit.  Apparently, all of its passengers are asleep with only a nightlight on.