Originally Posted by pandaperth

The rules of the Oneworld Explorer ticket are here

Your itinerary is:
JNB-xLHR-xLAX-SCL-LIM-GRU-GRU-EZE-xJFK-xLAX-SYD-PER-HKG-NRT-DEL-xNRT-SIN-xLHR-JNB

MAIN POINT
Rule 4(e)3 states:

You have two arrivals and departures for Europe
At least one of these MUST be to or from one of the countries listed
Neither of yours are

Other points:

• what do you mean by GRU-GRU?
• your JFK-SYD flight is just that - no need to show xLAX, if you do show it then the tool will probably consider it an extra segment
• there no longer is a OW flight GRU-EZE (BA used to fly it, but stopped some time ago)
• one of your two entries to Nth America can be a stopover (you have two transits) - as can be your entry to Europe (the one that does make use of the exception quoted above)

Happy planning

ps I just plugged to following into the online tool:
JNB-LHR-LAX-SCL-LIM-GRU,EZE-xJFK-SYD-PER-HKG-NRT-DEL-NRT-SIN-xLHR-NBO
The only flights I selected were: EZE-xJFK-SYD and SIN-xLHR-NBO
the tool shows it to be a valid itinerary