I’m really not sure how to describe this issue beyond the subject.
If you click on “register” on any class, you are able to start typing in your information. But, if you click on anything beyond the Mixed class (try, parent/youth, youth, senior, or women’s), as soon as you click on any field to begin entering your info, it switches to the Mixed class, which is an entirely different embed!
I built this a little over a year ago, and I never received any reports of this issue until just now. I have not changed anything about how that embed switches in the meantime.