[Faith65]

Just look at the paint striping on the 2 trains- they are different

[TXnMA]

Good observation! The front photo was taken by a Congresscritter, so we know that was their front unit. Look at this aerial photo from the article you linked:

The rear "pusher" engine unit was from another "consist", so it was in different "livery". Both, of course, were Amtrak units...