I wonder if NW's computers are getting better at figuring these things out.

I had a flight earlier this year, LGA-MSP-ANC, missed it, and had to take HPN-DTW-ANC. It was an award ticket. A few days later, the HPN-DTW-X segments posted as revenue flights, in Y no less. A few days after that, the miles and EQMs were gone, and the N appeared - as it should. Would have loved the miles, although getting EUAed on DTW-ANC on an award ticket in summertime made my day.

In years past, if you had NW flights and were booked onto a different NW routing because of ir opps, that often would book into Y. Ah, the old days.