my wii has had some problems. once when i started up super mario galaxy i noticed that mario was running arond in circles uncontrolably even when i was not touching the nunchuck. so i turned of my wii and started it up the day later and even though the super mario galaxy disk had been in the wii all night it still said "the disc could not be read. eject the disc and turn off the power." so i ejected the disc but when i tried to turn off the power it did not turn off so i had to unplug it from the wall. has anyond else had this problem?