[theducks]

Originally Posted by FaceDeer

http://www.fanfiction.net/s/9622698/1/ has an author name with "with" in it instead of "and" or "&", Calibre might be splitting on that too.

What a clever program.

There is a tweak for this:

ID: authors_split_regex

By default, calibre splits a string containing multiple author names on
ampersands and the words "and" and "with". You can customize the splitting
by changing the regular expression below. Strings are split on whatever the
specified regular expression matches, in addition to ampersands.
Default: r'(?i),?\s+(and|with)\s+'