Being a Contrarian by nature.....what I take from the three photo is the relative movement.
Yes...the dark mass seems to make very little movement towards the building....but also moves towards the Pillar that creates the blind spot.
That to me is the more important information to be gleaned from the series of photos although the movement towards the building is useful as well.
Nice work producing the photos....that certainly adds to the discussion and we appreciate your effort to provide them.