H'm this one is a thinker. Thanks for the report! I'm gunna need a minute to figure out why it's doing this 😅 if it helps, though, you ended JUST short of the actual ending. Except for one passage and the credits, you did get all the way through!
EDIT: Okay, I can't replicate this! Which means: either it was a series of unlucky clicks (I think I've observed that the count kind of goes haywire if it gets clicked too fast: I'm not even sure if that's what it is, but sometimes the count messes up for no discernible reason, so I'm chalking it up to the engine), or something in the exact sequence of events you chose from a certain point (and I don't know which point ;;). If you try replaying the chapter using the build a save feature, hopefully you won't encounter the bug again!
Sorry: this obviously isn't an ideal solution, but there's a lot of moving parts on this one and if it isn't the OBVIOUS problem (ie, I named something wrong or have a passage that's affecting the count) then it could be anything ;;