I thought that an award trip is not considered RTW if there isn't a minimum number of stopovers. Or is that so only on US?

I want to go DEN-BKK and return SIN-DEN, in First. The only way I'm finding Saver First availability is going through Tokyo but returning through Frankfurt. Reservations said that would require a RTW reward. Really?

So i'd have to go TATL on the outbound too, but it requires a 12-hour connection in Germany including having to fly from FRA to MUC.

Also, anyone know any trick to get UA to give me the non-stop LH DEN-FRA? It's available on the ANA tool, but UA say it's not and force me to take UA DEN-ORD-FRA.