The tag does make it clearer, but the tag's also a bit of a spoiler.
Give the potential confusion, I was okay with this. I was tempted to title it, "What She Thought Would Happen" just to make it clearer.
The chapter division in general is rather artificial, so I would probably agree with the folks on IRC*—rather than keeping each update as a separate chapter, it would make more sense to collapse the previous updates into chapter 1 and just keep the newest update as its own chapter.
I actually don't think that was the motivation behind what they were saying, but it's kind of difficult to explain now. I'm not quite sure how I feel about this, but the benefit behind sparse releases is that there is plenty of time to think about how we can handle this.
In fact, you could probably remove the chapter numbering altogether and just have "Their Story" and "Their Story [(Date) UPDATE]".
I can say without reservation we'll be doing this from now on, thanks for the suggestion!