I don't know the whole story here but it might have just been the Sim itself that got them; it happens. Additionally, sometimes applicants are given a second Sim session. It could be they want to give someone a second chance for some reason or that they want to confirm some marginal, or worse performance for washout purposes. It is done for both reasons. As far as a SE approach, I have a personal story. This happened during my first 135 PIC checkride. I nailed the SE approach; though was just hoping to get through it, doing a respectable job. It turned out so good that I, of course, remarked to the Check Airman. He responded with, don't get cocky, most folks fly the SE approach better the the all engine approach. He went on to say the simple reason being that you are more focused and also due to the possible ramifications of not performing it correctly...