Yes administrators & teachers sometimes misunderstand. My child attends a school that does see a lot of gifted kids, and I think they are better than many yet there are still difficulties. An example was with my son's science class last year. It was his only class that was not an honors/gifted class. (Because they didn't offer it.) And while my kid aced (99.5%) the tests, but he had difficulty with the class & teacher because he wouldn't fill out all the boring & repetitive homework/seatwork.

As to the second question, my son is much more sensitive to touch. He doesn't like sand on his feet, or playing in mud. And clothes can not be itchy, down to the point that in 6th grade he would ONLY wear one outfit. Never seen a problem with sound or lights.