The last few times i just missed a setting so it might not be much.. but it seems when i click redo its not redoing the terms i chose and i dont know why
I have not heard about this issue from anyone else, so we'll need a bit more info to look into it.
Try this: if it is consistently not working, press the redo button, and then AFTER that, tap the ? button at the top and send the quiz report in. Please be sure to note exactly which term you marked as redo.