hmmm I see your problem mate, I have seen many people try the method you are using and some find it very hard to use!

It is impossible to say where you have gone wrong without close up wireframes.

Have you looked at the polygon head walkthrough video here: https://www.simplymaya.com/movie_page...html?tut_id=54

IMO it is a far easier way to do the head.... but I guess each person has there own way.