the bd-live registration is a little quirky. I've had two discs now that i've tried to register, and it's told me i've already registered them, even though i hadn't registered those specific discs yet. So even though the movies aren't the same, whatever registration code is being sent out is the same and you won't get the points. But so far that's only been like 2 out of 16. And once you hit ten discs, they take 280 points automatically and send you a coupon for "$10 (1000) points off a bluray movie" (in the store), which is funny because even after that, the movies are still more than regular price at amazon.
also with the update your wish list points, you have to completely wipe out your old wish list and do a new one. Someone mentioned not getting points a page back, you have to clear it and redo it.