That's one of the beauties of art. U can alter someone's perspective. So u can have the most symmetrically correct work in the world but don't try to correct someone's vision of something. Ur missing the whole point of what ur looking at.
I hope what I write makes sense: The stairs seem to have an angle, I mean going up/down not straight ahead. Because the viewer has the same angle as the stairs, that messes with perspective. My opinion is, the viewer should have a different angle, like watching from higher or lower.