I am an instructor for a college biology class. We just had midterm grades due last week, and I had graded everything submitted by Oct. 13 to figure my course grades. I went onto Canvas today, and had 2 students with submissions on month + old assignments. Late work carries a penalty, and after a certain time can't be submitted anymore. However, both of the assignments carried a "date submitted" as on time. This can't be true, because I had seen and graded all assignments that were submitted. So that means that either a) Canvas had some kind of system error where the students work was not loaded to my interface, or b) they've managed to change date and time settings in some way to fake an on-time submission. Anyone else heard of or seen this?