Slipshod, It is just a rumor. One that has been rolling around for quite some time!
I am pushing for a separate course for those who are in need of a safety class for their falconry license. These folks have express no interest in using a firearm, now, or in the future. Some refuse to even demonstrate safe gun handling/shooting in our classes, which is a requirement in my classes. It is that, that has cause some severe problems for us instructors.
Again, not to worry about a separate muzzleloader course. If you practice all of the basics, regardless of the implement you use, you will be a safe hunter in the woods. Enjoy you time out in the woods. Joe