I run
Code:
calibredb catalog ./test.csv --fields=title,authors --sort-by=series_index
and it still start by authors, so I guess it keep the alphabetical order. as it is a csv, it is not very important, I can swap columns in libreoffice
maybe another solution, create a custom column in the gui based on the subserie number ? would that be possible ?
P.S. I just found out the the custom column should be with a # and not a * in front, so #series will return the subseries but #series_index will not add the number