No mix up just shines some light on it. I would go on the teams website and see if he is listed as the recruiting coordinator. If he is all is good. This is typical behavior from coaches. The school does not always inform the coaches of who has applied, often times the admission may not want to know, who the athletes are. Depends on how snooty the school is about athletics.
My son had the same conversations many times with the coaches that were recruiting him. If there are issues with admissions reach out to the coach. He just wants to keep track where you are in the process. And he may not be able to get it from admissions.