If you've posted something and then quickly removed it, it's possible to end up with a segment on your story analytics page which can skew the story analytics to be off. This is definitely not the crisp analytics dream we're all searching for, so here's how to avoid it.
To remove a segment from being counted towards your story analytics, hover over the segment and click "remove from story"
This will permanently remove this segment from being included in the story, and will update the video and analytics accordingly. Crisp, accurate story analytics, here you come.