So why write them? If he was REALLY trying to CYA then he would have sent his concerns up the chain otherwise he would be in deep Sh%T if he had to explain later why he didn't let someone else know about a supposed violation of a direct order. Nope I don't believe these are legit documents since CBS will not say who they got them from so the originals can be examined.
thought you should get some credit for the memo story as well. You were on the case as well