Bravo on booking that itinerary! On even being ABLE to book that itinerary...
One question: I'm assuming your ICN-HAN in on VN? Check your itinerary on your "My trips" and compare it to your receipt. Is the VN leg on both? I have a VN leg from NRT-HAN and it keeps disappearing from my PNR - 5 times it's disappeared and been reinserted. It always evaporates around midnight Vietname time. No one seems to know why.