I apologize for my ignorance. Can you explain T1 vs T-24. Is that 1 hour before flight and T-24, 24 hours before flight?

I appreciate your feedback Goaliedad30.

Do you know if a Miles Upgrade clears before a complimentary one?

Starman... Are you basing your assumption on a complimentary upgrade or a Miles Upgrade? As a Silver, I had zero assumptions that I would get a complimentary upgrade, hence while I thought using Miles would be my only chance to get an upgrade at all...