I am considering booking this wonderful fare of OWE out of JNB. Some questions if anyone can help:

1) Rules from FewMiles' site concerning transiting the same continent more than once.

EXCEPTION 3-- /APPLICABLE TO JOURNEYS ORIGINATING IN AFRICA EXCEPT SOUTH AFRICA
AND ZIMBABWE/ TWO INTERCONTINENTAL ARRIVALS AND TWO INTERCONTINENTAL DEPARTURES
ARE PERMITTED IN EUROPE. ONE OF THE INTERCONTINENTAL ARRIVALS/ DEPARTURES MUST
BE A TRANSFER /WITHOUT STOPOVER/ IN LONDON OR MADRID ENROUTE BETWEEN AFRICA AND
ASIA/AUSTRALIA/NORTH AMERICA/SOUTH AMERICA.

What is the rule for JNB origination? Can I transit or stop in Europe twice or not? Is there a way to do it without going through Europe twice?

2) Since there is no OW carriers based in Africa, how do I get any intra-African segments?