Multiple choice assessment is wrong

There is a bug int he multiple choice questions. I set the question up with 2 right and 2 wrong answers and made the question assessible with a 100% minimum grade. When answering the question, I marked all the answers as right - and passed the question with a 100% assessment.

You can find my example here:
https://demoen.simplylearn.no/courses/to-build-a-course/units/lesson-3-instructor-responsibilities/