Just a follow-up...
I'm flying back to PIT today, and didn't get the UG. FC is listed as booked full, and I'm 1 of 3 on the UG list. However, for my flights next week (PIT-DTW-PVD), I was upgraded
6 days out as a CO PLAT.
I give up trying to figure this out!

Either I just sucked at picking flights into and out of DTW this week, or lots of elites were on my flights.
Thanks again for everyone's help on this issue. Happy flying!