Is it the DL Platinum Amex? If so the MQM boosts from it can get you 80% of the way to FO. Perhaps you made Silver and never realized it?

Nope, just again checked my status "Skymiles Member"

If the boarding pass said "Breezeway" then it would say "Silver Elite".

No, Boarding pass says "Breezeway" and "Zone 2" but does not say Silver Elite.

My husband has the same ticket as I do (different record), he is sitting next to me on the flight and his does not say "Breezeway" and his indicates "Zone 4". It's just weird!