that's weird. I didn't think there was a limit to the pot.
my one just keeps going around in circles, doesn't matter which way you turn it.
if you turn it counter-clockwise, it will get brighter and brighter until it goes off, then it will start off dim again and get brighter as you turn it, and just goes around in a loop.
but then again, the pots are so small, they could develop faults pretty easily