I understand what you say, but Barnes was taken off with 6 minutes left and if you listen to the OG interview after the game, OG does not sound convinced new strikers will be in place by Yeovil. Barnes in the team at Yeovil is most important, as he is more likely to score the winner there than getting two goals in 6 minutes last night.
Perhaps Barnes needed to get away before the final whistle like half the crowd.