madden franchise mode

im playing as the bills in franchise, and everytime i go to sub players out/in Dion Dawkins is my starting center no matter how many times i take him out or how many times he gets injured. every play he’s at center and there’s literally no way to fix it, i’ve also had an issue where random players on my team will sub in at running back and i can’t sub them out. a random corner or a random linebacker will be at running back and there’s no way to take them out