Happy for you to improve, but really not much to stress about a 30 in Math on ACT. Admissions is not really as much about that as many would have you believe. Just because the average admitted student had a 33 in Math, does not really have anything to do with whether the 33 (versus a 30) had any bearing on the admission decision. Most often, you will see highly qualified students attracted to certain schools, but the school may have a much lower expectation of scores than the student actually received. You are a perfect example of that. You earned a 30, but went back and enhanced your grade. You make likely have been admitted to whatever school with the 30, but because you panicked, you re-took and got a higher score.