Why does GET /d2l/api/le/(version)/(orgUnitId)/calendar/events/user/ return data for more than on...

I'm working with the GET /d2l/api/le/(version)/(orgUnitId)/calendar/events/user/ endpoint and am a bit confused about the returned data. I have a student that is registered in 3 different courses. When I call the endpoint for each orgUnitId it looks like the endpoint is returning data for all 3 courses, not just the one specified in the URL. Re-reading the description for the endpoint leads me to believe that I can supply one orgUnitId for a student and it will return calendar data for all current orgUnits that belong to the institution and the student is registered for. Am I understanding this correctly?