As for the dualmode, that does always happen to 48. The real question here is what happens to the two locos from 48 after they are taken off. I am pretty sure they are not put on 448, but could very well be wrong.
I can say for certain that both from 48 were attached to 448. Either that or I'm having a really realistic hallucination involving getting out of the sleeper car, witnessing the process from the platform, and having photos of the process on my phone. :lol:
I'm pretty sure that the opposite end of 448 had a loco on it when 48 (which I was on) pulled into ALB. I did not pay attention as to whether it was removed. 48 pulled out before 448, so it's possible that one of the two diesel-only locomotives was removed from 448.