Although a rav muvhak is deserving of the same honor you would give your parents, you may correct him if he wants you to correct him, just as you may correct a parent who wants you to do so.

It is theoretically possible--but highly unlikely--to have one main teacher (rav muvhak) who taught you most of your Torah knowledge. However, a rav muvhak might exist for a person who was not brought up religiously observant and did not have a traditional Jewish education.