Hi - I'm trying to book a one-way flight from SGN to NYC and it looks like Google Flights is showing me my ideal itinerary for ~$300 less by booking with a travel agent vs. on United.com. Is this a phantom fare or some sort of bulk ticket where I cannot accrue PQMs on UA? The following is the fare construction:

SGN NH X/TYO UA EWR 530.00KLRCVAO NUC 530.00 END ROE 1.00 XT 35000C4 456000JC 105000OI 212000SW 126000YC 160000XY 91000XA 410000US 2187000YQ