One of my students sent me a task twice because he felt one answer was not correct. I've seen the submission on the submissions sections but I was wondering if there's a way to see both submissions.
Yes, there is a way to do that. Just enter on the student's submission page and you will see a message like this one.
The message warns you that there is a previous or newer submission for this student and task. With the buttons on the message you can navigate through all the student submission for the specified task.
I hope I cleared your doubts, if not or you have any other questions, please let use know.