The one time I saw it, it had 5 Amfleet I cars. All of the videos I've checked show it with all Amfleet I cars. We've been debating consists a lot lately. First elephant style P42s vs. back to back P42s, now Amfleet IIs vs. Amfleet Is! :lol:
My source is ESPA news. ESPA had been working with Amtrak to get Amfleet IIs on the Adirondack and they announced that they succeeded about a month back. Of course whether that success has stuck or not is anyone's guess. So this development is relatively recent. Checking videos from before June may not be very helpful.
BTW this has also been reported on the Trainorders board as well as on railroad.net in the recent past.