yeah theyre really strict about this. Long story short, I was overloaded on credit hours but really wanted to take an elective for personal reasons. The deans office wouldnt let me overload to 23 hours for an elective, so I thought I might be able to take the elective instead of a requirement, and then I could take my requirement in the first summer session and still graduate before matriculation. I asked a few adcoms, but they all told me in order to keep an acceptance i had to graduate in May of the year before matriculation. Good luck.