Well then United lost due to lack of training. This was on an active reservation I got this info. She saw the reservation and stated even though the Jeju flight was a part of it the luggage would not be checked all the way. I have to error on the side of caution, especially in today's word where airlines are on a race to the bottom to make travel as miserable as possible for passengers. I need a guarantee of checked all the way to the destination.