When triggered this glitch will ignore the handle resting a 0%, and bring certain channels up live while editing the sub in blind.
The trigger conditions seem to be:
1. Raising and lowering the handle of a pile-on sub at least once.
2. While the handle is at zero, changing the channel level to zero in the sub blind. Any later level changes to that channel will then be output live.
Doing an 'About' on the affected channel shows it being controlled by the same submaster.
Raising the handle above zero, or removing the channel from the sub, restores normal operation.
I have reproduced this glitch in the offline software.
[edited by: 33boardop at 3:05 PM (GMT -6) on Sat, Apr 27 2013]