FYI to anyone that puts their GE or Nexus number into the Secure Flight info at delta.com.
I realized on my last booking that, without any action on my part, Delta had moved my Known Traveler Number into the "Redress Number" section.
They had also moved my middle name into my first name, so middle was blank and first had "First Middle" in there instead.
Anyone who is not clearing may want to recheck their Secure Flight Passenger Info.