I've just purchased a Wii yesterday, and I've noticed that my remote is a bit off.
Instead of pointing at my TV screen, I have to face it towards a 3 O'Clock position and control it from there.
I've tried 3 remotes and tried reconnecting each one multiple times.
I've tried changing the lighting from near pitch black to full lights and sunlight.
I've moving my sensor to many places.
None of these have worked so far.
I've come to the conclusion that it has to do something with my house.
I put it on a marble floor, and I'm not sure if that effects it or not, and its around a lot of other electronics (karaoke, DvD, CD, VCR, surround sound, the works).
The thing that strikes it odd is that even when I move the sensor I still have to point at a certain area (my fireplace/buddah shrine thing). I'm not sure why it is directed to that area.