The current behaviour of the Course Presentation is that each attempt will be overwritten after clicking on the last overview slide.
??The report for Course Presentation works by only displaying the latest result I'm afraid. This means that if the student takes the task again with a valid result, the previous one will be overwritten.
This could happen if you just click the last page in the Course Presentation, which will submit a result. If you had done none of the tasks inside the Course Presentation this time the report will be overwritten with empty reports, unfortunately.??
Taken from the forum.
Similiar to it would be nice to implement the option for students to choose manually when answers should be submitted.
This prevents accidental deletion of their attempts which could result in a bad grade.
Implementing a button to manually submit the answers