Storyline lets you track a course by the number of slides viewed, a quiz result, or a completion trigger. Sending more than one measurement or multiple quiz scores to your LMS for the same course isn't supported. (However, Storyline 360 has more quizzing and tracking options.)
You may be able to track more than one SCO (shareable content object) in a single course by publishing your quizzes separately, then embedding them in your course using web objects. Bear in mind that we don't officially support this method.