I am writing a story 'A naive wish'. After 25th chapter I have the story branched in to 2 paths in chapter 26. Now for chap 27, it will be again a single path. Is there a way to merge both paths to chap 27 or should I add every future chapter twice from now on? Please let me know what I need to do here.
Sounds like you want to create a link chapter. After you've created your chapter 27 for one thread add an empty chapter to the end of the second thread and choose the link chapter option from the sidebar menu. More detail here, item number 5 https://chyoa.com/chapter/Add-a-Chapter-Edit-Chapter.263075