I can see you're not gonna let it rest by simply saying it was a mistake....
You now have a fresh excuse...why not just say "sorry, didnt know the rules, or it was misleading and you'll try to more clear in the future?"
I didnt jump to any conclusions other than to read what was written...is the world to assume a disability at every turn that would prevent reading and typing (that was certainly clear after the subject), understanding rules and sentences?? From what I have read, people with "disabilities" wish to be treated the same as everyone else - well, you just were.
Cheers, yourself