Did you set your browser_cache_age_limit higher? Because I suspect your cache isn't updating.
First, I'd try setting that back down. But if you want to keep it, you could clear your browser cache entirely, which would require reloading those stories.
Otherwise, you'll need to at least force reload (usually ctrl-shft-R or cmd-shft-R) the first chapter of each story.
If you see a cloudflare page before you see the chapter 1 page of a story, make sure you have loaded the page 'normally' by clicking to chapter 2, then return to chapter 1 with the "< Prev" button on page, not the browser back button. Or click to the author page, then click the story link there.
Read the
BrowserCacheFeature wiki page for more details.