I have the same guitar and I seem to be having the same problem.
At certain times, sound bleeds through when the volume is turned all the way down. It also doesn't seem to reduce the noise until I've turned down past 5 or so.
I thought they were just crappy pots.
I was thinking of switching them out for something better, but i have no
experience with pots whatsoever.
Anybody have any advice on what I should look for?