Thanks. I actually looked at DTW-SLC-PSP and it comes up the same. I just went back to Delta.Com and checked again and now I'm getting all kinds of screwy results. If I check DTW-SLC-PSP leaving 7/4/2013 - 7/7/2013 I now get an "L" fare back for around $900. Funny thing is, this was the same price that came back for the "M" fare when I checked earlier. Also, when I check that flight, it doesn't list FC as availble but if I specifically search for FC then it comes back.
Perhaps the IT folks are "tweeking" the system again

So far, I've tried three searches in a row for the same itinerary and gotten three different results/prices.