hi, i have an existing round trip for 2 pax with Global Upgrade applied both ways (4 GUC used). I want to change to return flight and when currently searching the outbound now is only showing 1 GUC upgrade space available. When calling the Diamond Desk she promises me when she reprices my ticket she will get my two upgrade spaces back on the outbound. I'm nervous though that won't be the case. Am I overthinking it? Can the agent hold that upgrade space? It sounds like when they change a ticket they have to reprice the whole thing. Will those 2 upgrade space I have just immediately go back for her to grab them again?

Are upgrades determined in order of booking? Will I got to the back of the list for people looking to move up to Delta One using GUC? I currently see 4 Delta One seats available, so holding out hope I can get one or two seats! (I currently used the GUC to confirm into Premium Select and waiting on Delta One).

Thank you!!