Thanks for the quick response. I received a ticket number, seat numbers and confirmation codes for KAL and CZ.
I just called Delta and they didn't have any explanation for why I was bumped from the original flight. I did, however, manage to find a slightly more convenient routing that has me flying July 10 ICN>PEK on KAL and then PEK>URC on CZ. Is this kind of a thing typical with redemptions on CZ?