That is Alice-in-Wonderland insane! If you reissue with AA, for a hypothetical, is their rate desk going to apply AA fuel surcharges to all the remaining segments, even those not operated by AA? If during the original issue you already paid a higher fuel surcharge, will you earn a refund during the reissue? If you now pay an AA surcharge for a QF leg, will the Qantas agent collect the difference when you check in? Or simply demand the full amount for that segment?