I have a miles ticket that was purchased last week and have a GUC applied and wait listed and have Diamond status. Companion has paid ticket via delta Amex card booked in April with silver status. If I apply a GUC will they clear ahead of me because their ticket was booked before mine or no because their certificate was added after mine. I don’t know if it makes a difference but while they are separate reservations they are “linked” whatever that means.