I had posted my first assignment this year, graded it through speed grader, and they appeared in the gradebook. I posted a second assignment, graded it through speed grader, and now it won't appear in the Canvas gradebook. I double checked in the assignment list that I have "SIS" posted, and the "SIS" green icon appears in the assignment list. I have tried checking and un-checking the SIS selection on the assignment, and that hasn't worked. Also, the "Post Grades" button has disappeared...any suggestions?