I think that you need to get someone higher up at Orbitz. Even though Orbitz is partially owned by UA, UA will disavow any responsibilities for tickets not purchased through its own venues (the bomb or the phone or the non-existent city ticket offices). If your tickets have the wrong names, you could face problems getting on the plane (since your ID must match your ticket) and even if somehow you got through on UA, the TSA won't let you through.