BI Report not finding learning plan?

Summary

I want a report that returns all learning plans to which a selected course is mapped. For SOME courses (not all) it doesn't return the learning plan.

Content

Here is the summary of my report.  I've also uploaded the .olbr file.

Name

* Find Learning Plan by Course

 

Data Views

Courses, Learning Plans, Learning Plan Mappings

Joins

Learning Plan Mappings INNER JOIN Learning Plans

Learning Plan Mappings INNER JOIN Courses

Join Conditions

Learning Plan Mappings.Learning Plan Mapped Item TypeID = 4

Learning Plan Mappings.Learning Plan ID = Learning Plans.Learning Plan ID

Learning Plan Mappings.Learning Plan Mapped Item ID = Courses.Course ID