I suggest applying broadly to DO schools (at least 10) and you should receive several interviews. You could try these MD schools also:
New York Medical College
Medical College Wisconsin
TCU-UNT (new school)
An upward trend is helpful and your grades in recent years will matter more than those when you were a teenager. Also your MCAT of 516 will attract attention at some schools. You are competitive for all DO schools.
Their 1st class is graduating next month and their match was fine. The problems there seem to be with the administration-not the students. Most of their students are from CA and some applicants from CA and the west coast prefer to stay in that region rather than go Caribbean or DO schools out east.
Your 516 MCAT is well above the median at all DO schools. Go ahead and apply to KCU-COM. You could also try these schools:
PCOM (both schools)
VCOM (all 3 schools)
LECOM (all schools)