proper grading fairness when certain questions dropped on exam
This is a common complaint.  Anytime a professor relaxes a requirement, the students who achieved it are unhappy (turn in time for a paper, whatever).

As far as those questions, it is not clear if professor decided they were wrong, ambiguous or just too hard.  In any case, what he did had the impact of removing them from any relative ranking (which is why the screams from those who got it right).

I wouldn't get outraged over it.  Sometimes there is no perfect answer. (Consider also the possible damage from leaving the questions in if they were flawed in some way.)  Just get over it, work hard, keep doing well.