If I book a reward ticket from ALB-(NYP)-PHL, and a return PHL-(NYP)-ALB, (two one-zone unreserved coach rewards), will I be sent 4 "boarding passes" (or whatever they are called in Amtrak lingo) for the 4 legs of the trip?

Would it then be possible to use the tickets out of sequence, for 2 separate NYP-PHL and NYP-ALB roundtrips, since these are unreserved tickets with no train number on them?