I think it has to do with the spectrum of anxiety.. and.. well maybe this metaphor will make sense..

Sort of like if you were standing downtown, and a building collapsed, and then shortly after a couple of windows broke in the building next door. You would probably be so focused on the collapsed building that you wouldn't pay much mind to the broken windows... doesn't mean it wouldnt still affect you though in some way, you just might not be focusing on it.

I do experience the same thing though.