So Emirates will resume Cape town and Johannesburg on 1 Oct an Durban from 4 Oct

Now this is what I find interesting

Ek has one flight to Johannesburg EK 763 dxb 0955 arrival 1615
But you can also book their Durban flight as it now routes DXB0405 JNB1015 to DUR EK775. It's outound from Durban routes direct back to DXB

Here is the part that's interesting. So if your flying to Durban you would wait on the plane I assume till the Johannesburg pax are offloaded. But now if you search to flying from Johannesburg back to Dubai it gives you two options th direct JNb to DXB and also the JNB via Durban to DXB flight.

So that means the arrival pax into south Africa(Durban) is mixing with departing pax from south Africa (Johannesburg)

Maybe I'm.missing something