Master class attribute
In order to display the correct data in Statistics, you need to distinguish between the classic, i.e. main nursery classes, and other, i.e. secondary, classes (e.g. rings). Therefore, we have added a Main Class field to the class settings and for your nursery classes, select Yes in this field.
WARNING: At this time, you have a default setting of No for all classes. Until you turn this on, nothing will be displayed in your statistics.