This was something I wondered about many threads ago. It could explain the locked/unlocked lies. In this scenario, The question is, "where is the key?" after JW says he got it, unlocked and relocked the car. Then he realizes this means he had the key and knew where it was. Oops. So he says he lied. It was actually unlocked, meaning, he never saw or touched a key. Whichever way this lie goes (meaning which one is the truth) it still emphasizes cars, keys and the money. And for some reason he lied about those. And just happened to have an old Mosler registration in his backpack. In his car.
While we can't really explain these inconsistencies and coincidences because we don't have enough facts, somebody needs to. I'm betting on LE.
All we can do is guess what it means. But it has to mean something. It can't all be innocent. JMO