This is crazy! (but funny) since It's been brought up, Cloud cover could explain the difference in shadows, BUT, is the lounge chair on the dock tilted at more of an angle OR is the difference due to the photo being taken from a different aspect by the perp, CLAIMING he moved DOWN to the dock???? There for creating the Illusion of the back being raised a few notches. Or, is the 2nd picture taken AFTER someone used the chair? I don't know. You decide.