Training wheels,
I can assure you if I had company frequency on comm 2 I'd be missing more transmissions than if I was to monitor guard.
If we were to have the same frequency on both we would get that echo. Much the same that Morno has been talking about. However I'm starting to just turn down the audio on comm 2 below 10,000. I'll see if I can make it changed in the book when I talk to the CP.