I was attempting to copy a label from one course into 3 other courses that needed to have that information.
Rather than doing a 2-step backup and merge, I thought I could do a 1-step import.
In the initial settings I checked only "Include activities and resources" (because otherwise I can't choose anything to import)
In the Schema settings I checked only the label I wanted to copy. There is no option to include/exclude anything grades-wise.
Then I performed the import. The label copied over correctly. However, it also brought over all of the manual grade items and grade aggregation settings from the 1st course.
Not sure if I just used the wrong feature, used it wrong, or something went wrong here.
(Moodle 3.0.4)