Thanks Thai-Kiwi

I (wrongly?) assumed that if I booked multi-city with the dates like you used above, that I would be charged for 3 separate 1 way journeys?

Are you saying that in some scenarios, leg 2 and leg 3 would be charged the same/similarly to a leg 2 + leg 3 with no "stopover"?

By extension, if I am in Hong Kong and want to go to Jakarta, is there some way I can book a flight that goes through Singapore or Kuala Lumpur or Hanoi or Bangkok, and "stop over" for 2 weeks in that destination before flying on to Jakarta, and essentially pay the same as a HKG-CGK flight? (and if this IS the case, where should I start "digging around"?)