I have program music plugged into faders 25 & 26. When those individual faders are down, the music still comes out of L & R when I raised the master fader.
I suspect I have made an incorrect setting somewhere. Please advise.
Make sure you are adjusting the faders for the correct Mix. Select the blue mix button for the LR fader and then try the channel faders. You may have selected an AUX fader.