I took all of my on and off commands and doubled them up. Sometimes I would see the IR543 send out the unit number, them the command. Sometimes it would send out the unit number twice with no command. (I can see this because I have a monitor on my computer that tracks all X-10 activities). By doubling up the on and off commands it works 99% of the time. Sometimes it will send out two on and off’s but it doesn’t affect anything. Dims and bright would be different but only one is not enough to really do much anyway. Try it, it worked for me!

Chris