Thanks. Was already set to automatic (you probably missed that update).
I am currently using:
device_db:any device = ([{series}{series_index:| - | - }{title}] -> title), ([{author_sort}] -> authors)
This does almost exactly what I want. The only problem is that the sort order is not by the series eg:
series - 02 - name
series -04 - name
series - 01 - name
series - 03 - name
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