Course completion date not correct?

Independent Study Program courses certificates never expire. If you retake a course to refresh your skills, you may retake the exam however, our system will not re-score the exam and the original date of completion will always appear on your certificate for the course and the date cannot be changed. Courses are revised as needed and will appear in the course listings with a letter following the number (for example: IS-120 was revised and is now the IS-120.a or IS-800 has been revised twice and is now IS-800.b). If you took a course and it is then revised, you can take the revised course and receive a separate certificate with a current completion date.