I've only done xONEx's and other alliances' RTWs, and multiple stopovers in the same city aren't allowed on those. But I can't see anything in the xGLOB34 rules that prohibit it. Am I missing something? If it's allowed, then JNB-HKG-NRT-BOS-MIA-BOS-SFO-BOS-LHR-JNB would be a valid itinerary, yes?