I had noticed that MIA
was no longer showing up as CO
007, and this explains it.
It's actually a disadvantage for elites, because the computer considers it to be one international flight, and therefore you don't get upgraded automatically. Coming back NRT
I even called from Japan to try and get myself listed for the IAH
leg, but it still didn't work and I ended up sitting in coach.
Give me discrete flight numbers any day!