I set an assignment for my class. All except one student, who was experiencing connection trouble, successfully submitted their answer (typed directly as a text entry). I changed the due date on the assignment to give that one student more time, but then I also edited another section of the assignment, changing it from allocating it to the whole class to only allocating it that one student. As such, all the other students' responses have disappeared and I can't seem to find a way (including undelete, since I technically didn't delete it) to get them back!