MyMoodle can be a bit clumsy for this.
Sometimes a better way is
- In each course that should be counted, turn on completion tracking and set a completion criterion
- For each credential that is composed of multiple courses, create a course to hold the overview, turn on completion tracking, and add completion criteria including completion of each pre-requisite course.
The advantage of this approach is that you can enrol each student for any number of credentials, and get separate completion lists for each. You may choose to give recognition for prior learning this way. You can regulate enrolment in the credential separately from enrolment in the component courses, or you can use meta-courses/child-courses to automatically enrol students.
Completion tracking is described here - http://kb.moodlerooms.com/article/27/administrator