1. The instructor has created a site with both the Assignments and Schedule tools.
2. Instructors creates an assignment with due dates added to the schedule.
3. These events now populate on the Dashboard.
4. Instructor drops the Schedule tool from the site
5. Instructor updates due dates for the assignment
6. Dashboard still displays the original dates for the assignment.

A potential solution is to delete UI links from the Dashboard when a tool gets removed from a site.