Some variation of this comes up every so often. Here's a past answer that may help.
Quote:
Originally Posted by JimmXinu
FFF primarily just looks at the number of chapters. Some sites have unique chapter URLs, so if a chapter is replaced the chapter URL would change and FFF would replace it on next update (Update Always needed if no additional chapters to trigger update).
However, for sites that just number chapter URLs, you'll need to either manually delete the changed chapter from the EPUB or do Overwrite to get the new one.
FFF does not have a way to keep deleted chapters. Best option would be to rename the old one(book) and remove the story URL in Calibre, then keep a different copy as the 'proper' version.
|
I know it's been discussed more times, but I'm not having great look searching for it.
For detailed descriptions of how the different update modes work, see the
wiki page.