Assignment Due Dates Changed without Input

[talway]

Has anyone experienced the assignment dues dates changing to a previous semester without any input from the instructor?  I have an instructor who imported the course content from a previous semester into the current semester.  The adjust due date feature was not used.  The instructor went through and adjusted all of the due dates to reflect the current semester.  About a week went by and the instructor noticed that all of the due dates had reverted back to the previous semester.