[Foolproof]

I use in Calibre for author_names tweak

# The algorithm used to copy author to author_sort
# Possible values are:
#  invert: use "fn ln" -> "ln, fn" (the original algorithm)
#  copy  : copy author to author_sort without modification
#  comma : use 'copy' if there is a ',' in the name, otherwise use 'invert'
author_sort_copy_method =  'copy'

But catalog from C2opds has Author_sort as algoritm "invert".

Whats wrong ?

The settings of C2opds ? I can not find anything about this.

Thanks for answers.

(English is not my family language, sorry)