Guys, do not re-submit your questions as you might cause further confusion. A few months ago, I also received the same email after submitted my answers weeks before. RS graduate recruitment team emailed me on their own accord to inform me to not re-submit the questions as the subsequent email was only intended for candidates who had not yet submitted their answers. Therefore, there was some error on their side.
Everything is on email, so do not worry! Be patient. I did not re-submit mine, and I have just received confirmation that my app is being reviewed.