Yes, he clearly misidentified both aircraft.
The first one is a 747-400, second is a Delta 767-300.
As he based his entire calculation on the wrong aircraft type (KC-135), his final altitude is completely off and the whole page is simply incorrect. Not quite the military aircraft and its "noxious work of spraying heavy plumes of chemtrails" as suggested.
[Edited 2013-03-26 08:29:00]