My understanding for Alaska rewards on partner airlines is that we are allowed one stopover. I'm looking over potential itineraries for vacation early next year and thought about flying from LAX to SYD nonstop, then SYD to BKK. Unalaska's website, I'm able to book the one way from LAX to SYD, but when I that on the flight to BKK, it won't let me complete the itinerary. Is this not a valid itinerary?