No. This question, and all the questions, are you just being paranoid. As mentioned above, the 20 AP classes probably include AP’s in several languages as well as different variations of AP Studio Art. Just because a school offers that many does not mean that anyone can take that many. Scheduling conflicts happen to everybody - colleges know that.
As long as your GC rates your schedule as “most rigorous,” I would move on to other aspects of your application that you can control. Good luck.