Congratulations on getting reinstated
I am pretty sure you don't have to repeat all the first year courses, I think it's only the ones that you got below a certain mark in..not sure what that mark is.
I think they add the marks from both years (the ones that you are going to take this year and the ones that you took last year). I am not entirely sure about that though...talk to Sally Williams, she can help you with these questions and give you all the info that you need.
Good luck !