If your NILE course has other courses merged into it, you can see more information about which courses these are by going to the Gradebook, selecting 'Marks', and choosing 'Filter'. Please note that for this to work, you must have set up at least one test or assignment in the NILE course.
If you have students enrolled on your NILE course via a merge, you can select the checkbox next to that course's name and then select 'Apply'. This will update the gradebook to show only those students enrolled via the course merge.
If you apply a merged course filter and see the message 'No results found', this indicates that although you have merged courses, no students have been enrolled via this course merge.