It's a round trip. There are no rules prohibiting Asia-u.s. from going one way pacific, one way Atlantic. You have a stopover, a destination and an open jaw, cut and dried. Most United agents are mouth breathing idiots with sub90 IQ's who don't know the rules of their own program and fight this, despite an inability to articulate why. They also have no response when you note that RTW award allow something like 4 stopovers and THAT's what makes them different.