The flight path consists of a lot of calculations, and is open to error's, more towards the jump time than anything due to the pressure bump not being shown in the transcripts. the actual problem lies with the FBI, Carr stated years ago he couldn't find any of the flight data taken from the plane, nobody has a clue where the radar tapes are. Carr also admitted that McChord never turned anything over to them. they have nothing to prove anything about the path. I'm guessing they probably do have the documents, but decided not to publish them for some reason. why, I don't know....
I like to compare this case with the escape from Alcatraz. it took the FBI years to turn everything over to the Marshal's. once they started looking into things, a different picture emerged. reports of a stolen car, and a raft on Angel island. things they seemingly covered up, and buried deep in the files. the story, or myth was no raft was ever found, and no crimes committed after the escape! could this be the case here, perhaps, but I can't say for sure. it sure is strange that major evidence turned up missing in this case....