The manager/supervisor said that you can only use the double transit if you do for instance LHR-NBO-LHR (or LHR-NBO//DAR-LHR) -- that is if you touch South Africa it's not valid. I asked how she was reading that from the rules and she read me the relevant section and said that is how she interpreted it and that there was no point in me arguing because she wasn't going to change it. I think the interpretation is so obviously the wrong one and kept reading her the rule and asking her where it said I couldn't go to South Africa and she really couldn't justify it... but I finished it up the way she wanted me to and got the record locators hoping another AAgent would be able to correct it but sounds like from number_6 that that won't be happening. I will attempt with QF today and report back (I'm not excited about the prospect of paying the additional fuel surcharges - but I must get to MRU because I've sandwiched an AONE4 in between my LONE4).