Getting NW flights to show up only works for some itineraries...
LON-RDU shows up as LCY(KL)AMS(KL)MEM(NW)RDU, and the return is RDU(NW)MSP(NW)LGW.
LHR-GSP does not work, LON-GSP works.
I never said the system worked properly, but it works better than in used to do