KFC gets my order wrong, TWICE in once week

I've been to KFC Melville twice over the last week, I always order a double crunch burger and ask for the red sauce to be replaced by white sauce, all other KFCs in the past were able to cope with this simple task. I however got concerned when the person taking the order shouted to the kitchen to say the sauces must be changed, on the first occasion the burger came out with red sauce and I decided to accept it as a human mistake. However when going back there less than a week later and ordering the same order, I was again concerned with the order being shouted but felt reassured when the person handed me my burger and said \double crunch burger with no red sauce and with white sauce". However"