That's the answer I have been scouring the Internet for. After several days of looking I stumbled onto this forum and found the answers right her on your post. I just tried your suggestion and it works fine. I notice though that there is still a faint hardly unoticable bleed into the vocal track.
My problem now is getting the hiss/ground out of the earpphone. It does not affect the recording but can be a bit distracting to the vocalist.