The Registar's Office can check the accuracy of the grade for you. My parents live in two different homes. Currently our system can only handle one permanent address. Yes, you may repeat a course without prior permission. The grade you earn the last time you take a course is the grade that counts.
Repeats average both grades together.
Come by the Registrar's Office and complete the replacement form. Maximum hours allowed for replacement are 15 for new freshmen. Students can find out from the Registrar's Office how many hours they qualify for. Pick up the Major Form from the Registrar's Office or the Department. Once completed, return it to the Registrar's Office for processing.