I'm trying to figure sun position based on the building lighting and sun position based on room lighting and to me they don't look quiet the same, but close.

Lets say this is a view directly to the East and it is northern hemisphere.  Maybe Deleware.  Sun for the buildings to me would be late morning in the sky.  Maybe 10 or 11 oclock.  South of verticle as to be expected. 

Sun for the room looks early afternoon, around 2 oclock and not south of verticle, but closer to verticle (like Florida).

So the window frame angles on the left side of the image correctly for a south sun but angles the wrong way on the bed (more like a direct overhead sun would angle).

Does that make sense?