Thanks for your fast replies. I am trying to book LAX-PVG- SGN. I can book DeltaOne but would rather save $ so I am Looking for PS seats on DL89 LAX-PVG. I can get delta one to book and can see the open PS seats. The connection in PVG is MU. If I leave out the connection, just going LAX-PVG I can get the seats? Very strange. Representative had no luck either and no explanation.