Grouping Order
Generators are applied to the current level, in the order they appear in the structure.
In the example below, we added Group by Issue Links and Group by Status generators. Two new levels were created, grouping our issues first by Issue Links and then by Status:
To rearrange the hierarchy so that Status is at the top level, followed by Issue Links, simply reorder the generators, so that Group by Status is above Group by Issue Links.