I see your point, but also see speculation taking place of facts.
The flight path vs descriptions are two entirely different things.
The totality of information basing Cooper's description are based on individuals who knew who he was, and was with him for long periods of time. the were similar in describing Cooper, this can't be overlooked.
The flight path was on an invisible highway that only trained individuals could read, or see. the FBI's own statements are "the believed flight path" now, when you look at the totality of information on the flight path, controllers, flight data recorder etc. one has to believe that this is also correct, much like the descriptions given by multiple people. yes, we have issues with the path, and that's why I'm trying to validate it, and not dismiss it. I'm open to any theory as long as it makes sense.
The timing could be off, but once again it's nothing in comparison to describing an individual. those are calculation error's.
The clothing is also pure speculation since nobody really knows if those were his clothes, or not. it's a guess. the descriptions are a little more than a guess, especially, if multiple people give similar statements.
also, it's not just people on this board in reference to the flight path, or jump time being wrong. the FBI has admitted things could be off, and Larry Carr is the one quoted on the 8:20 jump time, not people from here...the pressure bump appears to be the key that is missing from the transcripts...