You're on a different route; that's why you're not seeing certain scenes. If you make one "wrong" decision whenever you have choices pop up, you'll be locked out of future content on that route- chances are high that's forever.
It's basically a guessing game unless you have a walkthrough at hand. You may have made a choice 5 years ago that is impacting every scene you get or don't get, which is a big problem with this game IMO. You need several saves to see all the content to begin with, and even then you have to make choices with pinpoint precision in order for you to not get locked out of anything on a specific route. It's dumb. Choices in this game aren't giving players freedom of what they want or don't want to do for the most part, but are merely a ways to put you on a certain train track going one direction and one direction only with constant crossroads, either hitting a complete dead-end or the "right" way without you even knowing which is which.
My suggestion? Playing through the gallery instead of using your own saves if you want to see new content, otherwise- as you've mentioned, updates might end up being 1 minute in length for you because the routes you've been put on have no new content added to them.
