On sites with unique chapter URLs, FFF will handle it automatically. You could even use
ignore_chapter_url_list to exclude the offending 'chapter'.
And the
mark_new_chapters feature is specifically for indicating which chapter(s) are new.
Spoiler:
Code:
## You can exclude chapters from a story by listing their chapter URLs
## in ignore_chapter_url_list. Chapter URLs will be normalized before
## being used, so you can use either longer or normalized chapter
## URLs.
## NOTE: This will cause numWords(word count) to be off for most sites.
## This setting should be used in a specific story's section.
## Example:
#[https://forums.spacebattles.com/threads/lengthy-thread-name.100849/]
#ignore_chapter_url_list:
# https://forums.spacebattles.com/posts/10157294/
# https://forums.spacebattles.com/posts/10157297/
# https://forums.spacebattles.com/posts/10157299/
# https://forums.spacebattles.com/threads/lengthy-thread-name.100849/#post-10157400
Code:
## If true, when updating an epub that already has old chapters, new
## chapters will be marked in the TOC and chapter header by using
## chapter_title_new_pattern and chapter_title_addnew_pattern to set
## the chapter title.
## If set to latestonly, only new chapters downloaded this time will
## be marked (new) and existing chapters will have any (new) marks
## removed.
##
## mark_new_chapters can be true, false or latestonly
mark_new_chapters:false
On sites with simple numbered chapter URLs (like ffnet), I think you'll have to manage it manually. What I'd probably do in such a situation is use Calibre's 'Edit book' and remove chapter after downloading.
That's about as much as I can say without knowing story URLs.