never had that problem with my native wiimotess, but sounds kind of like when friends bring over their wii's and did a temporarily synchronization.
so try synchronizing the wiimotes the "permanent" way (holding down the red button on the inside of the wii and then the red button in the inside of the wiimotes... follow instruction in the manual or look up online) and see if that solves the problem.
the Wii is an epidemic.







