I called in today about a XXX-YYY-ZZZ itinerary where I saw PZ space on both segments yet the PP upgrade didn't clear. After explaining the situation the agent cleared the upgrade for the 9hr YYY-ZZZ flight but refused to do so for 1hr XXX-YYY saying there was someone else ahead on the upgrade list for that one. That flight was showing PZ2 and they wouldn't budge, even when I suggested they upgrade both passengers who should have already cleared. I guess I may need to call back tomorrow if it doesn't clear overnight. There is still PZ space available and it's still nt cleared, some 12hrs later.