After 20 minutes talking to SMS, and the guy talking to his supervisor they figured out the issue. Flight 0635 originates in SFO..and goes SFO-NRT-PEK. (my wife was on the NRT-PEK leg) In order to see the flight status you must search NRT-PEK on April 18th because the SFO flight originated on the 18th...EVEN THOUGH the actual NRT-PEK flight was TODAY on April 19th.
Pretty confusing if you ask me. I wonder if there is a way for Delta to separate out those segments for better clarity.