I never went to FBI secret Twitter message encoding class, but there aren’t many other explanations for Comey’s bizarre series of tweets since he was fired and could reasonably assume he is now under constant surveillance.
One explication of his Benji tweet could be that the unclear age of his deceased dog was a clue that the date he was giving was not true, but that the passing was. So an earlier date than Nov 30th is argued by some, but Nov 14th could conceivably also be late.
Or Comey could just be nuts.