So, a couple of points. Obviously, the rules state that the orders have to be given within 2 weeks of the individual leaving the faction, which occurred and is verifiable. Good on the pking staff member for getting the logs, especially considering these pks can take a while and end in the logs being wiped.
On consideration of this evidence, this pk appeal will be denied. The proper protocols were followed.
In regards to your assertion that they should've couped you, its way easier to kill you after you leave instead of couping you. And a lot less risky. Fact of the matter is, that when you left, you did so with the knowledge that they could still kill you.