What a tool. Pretty much sounds like he was lying to make you feel better (i.e. happens to everyone) that he was giving you a ticket for such a petty speed or he was telling the truth and is infact just getting revenge on everyone else who goes 1mph over the speed. Definite jobsworth though, should have pushed him over then teabagged him, at least then it would justify a fine and some points.
Certainly an interesting take on things.