Looks like i have SAB then?

I first posted this in the fuji forum- anyway -looks like i have sab? I can tbelieve it becuase i have only taken about 100 pics with the camera/ I bought it from the fuji uk refurb shop so do i contact them or is it the x100 email?

I am a little confused though becuase the person in the other forum said anythiong other than f2 will be over exposed-but its the completed oposite in my pics?
Can someone else please clarify for me please.