I have no idea what the old number was really for but it could not have been anything that important it is not on the new badges. As I have said this was told to me by a TSO in DFW, which is the last time I flew Delta. Never ever fly stand by any were with Delta. I think I was harassed more by Delta than TSA on that trip from hell.
And No I did not pack up and go home I went and made dinner and did things not based on a computer...remember I said all it took was me simply closing this darn laptop.