Here is the UA upgrade terminology:

Upgrade: Pending = you're outside your window looking to upgrade.

Upgrade: Waitlisted = you're inside your window but have not yet cleared and are on the Waitlist.

Upgrade: Confirmed = your upgrade is confirmed.


UA does not have any sort of EUA sweep mechanism. You either get it when you're within your window, or you get placed on a waitlist. As soon as a seat opens up, the system upgrades the first person on the waitlist.