Country of origin gets the number of sectors as per the rules. A stopover is >24 hours but a transfer is <24 hours. Therefore, plan your stopovers carefully - the rest are transfers. Note also that many airports have no tax or minimal tax for transfers - even if you clear immigration and go out on the street - although this varies. Eg: AKL gives an exemption stamp if you can prove you arrived <24 hrs ago - saves NZD25. Likewise LHR taxes (brutally high) are much less if you transfer. This is all calculated by the agent when purchasing the ticket (except for those airports where you pay separately)..