Originally Posted by
tentseller
I think they are looking at the USA NRT PVG flight as USA PVG.
Everyone who has done it know Chinese look at your itinerary as NRT PVG DTW
This is likely the key point (I.e. Japan to USA via China is all that matters).
@msp: I'm guessing you did stress this, but even if you didn't, that's not your responsibility. I encourage you to right things with DL.