[One last oddity or really question. My itinerary on delta.com still shows the coach line in the itinerary and still shows me with a coach seat, as well as the BE seat, on separate lines in the "Your Seating" section below the itinerary. Should I call Delta to get this fixed or is this how it would normally appear until I have presented the PMU.]

Go ahead and call Delta to be safe. I have never seen this before when using a PMU.