I e-mailed Outlaw asking them about this 2-channel to 6-channel bug and this was the reply:

"The feature you are describing is intentional and helps to ensure the highest quality playback. Though the user you have quoted perceived this as a software glitch, it is not. I apologize for any inconvenience this may cause you."

I'm confused how this is a feature... I didn't see this feature listed in the manual or anywhere else. Can anyone explain how this is a feature?