I've been in email dialogue with a senior oneworld representative over the oneworld Explorer ticket 'mileage issue' with their online booking engine. Problem statement and accompanying screen shots of the errors have been supplied and hopefully it is rectified.

On another matter, I bit the bullet and contacted Qantas yesterday on trying to book a DONE4 ex-CAI with CAI-DOH on QR the first sector. Yeah, I know....I'm a sucker for punishment. You all can guess how that is going. Been approx 4 hours over various agents on and off, multiple ticketing fare senior reps involved, etc. They don't know why their QF system will not allow the ticket to be verified if CAI-DOH the first sector. The first sector can be booked though. I'm going to try and stick it out I want to see how this ends (though I know the result).

btw I contacted QF as I noticed the ex-CAI base DONE4 fare for the oneworld online booking portal in many situations (BA, RJ, etc) was approx $1000 AUD more than that quoted on ExpertFlyer.