I just looked at my MP account and see no entries for my outbound ZFV-EWR in Nov. or my return EWR-ZFV in Dec. Or at least nothing appears under "airline activity." There isn't any place else it might be, is there?

How many redeemable and how many qualifying miles should those train trips earn? No miles toward UA life-time ones, right?

I'll call MP when they open in a little while to ask about this. Unfortunately, don't think I kept any of the tickets. (I did get a cardboard boarding pass for EWR-ZFV from the transfer desk after clearing EWR customs, which as I recall mean absolutely nothing to the Amtrak conductor. I had to use the conductor's cellphone, which he graciously lent me, to call Amtrak for the confirmation number they use.)