The 100% ‘In Progress’ means the course has been completed successfully, but that the ‘Finish Course’ button within the course has not been clicked. There’s no need to click that button, as the Certificate of Completion will be issued regardless (i.e. 100% In Progress is the same as 100% Passed for Accelerator completion purposes). And it’s actually better in some ways to not click the ‘Finish Course’ button as the quizzes become unavailable when the course has been formally been marked as complete. Other than that, there is no real distinction between 100% Passed and 100% In Progress.