Hi Andyboy,
Tooting Broadway to Shepherd’s Bush NR does separate the different routes from Balham. The OP actually added on a further leg to White City which then combines changing at either Clapham North or Balham with the same fare.
This actually complicates things somewhat. Using contactless you’ll be charged the fare that the single fare finder says. If you use Oyster it will charge the higher fare on exiting at Shepherd’s Bush NR and won’t refund it when you end the journey at White City. However, when the journey is run through the contactless back end later it will then refund the difference.
That’s a good spot about Shepherd’s Bush.