the previews look like they're updating... but not the page? Im confuzzled

I feel as though my browser is retaining cached versions of the pages, and it seems to be more persistent about doing so when I edit from the same browser session that I'm viewing pages in. For this reason, I always edit and preview my site in an incognito window, which means it doesn't save any cookies or cache any page details. This might be overkill, though.