That's because it's Google Now, not Google Planner. It's for giving you information relevant to right now. You don't plan to use Google Now for something, you check it when you want information relevant to you at the moment. If you stop trying to make Google Now into a personal organizer, you'll enjoy using it more.
> It's for giving you information relevant to right now
More accurately it is giving you a random subset of information that might be relevant right now. The behaviour is not deterministic so you can't rely on it.
