I recently made silver and was quite concerned when reading this thread as all I had done to update my status on existing reservations was to go online and replace my existing NW number with my Delta number and then replace the number again with my original NW number.

After reading this thread, I was just about to call NW to have the CSR manually update my number when I logged in and saw that I had cleared first for my red-eye on Friday.

I am not sure if this was an isolated incident or represented a change in NW programming.