Cannot fix Quicktime recording that recorded in multi-channel

Hello. In the past when I've recorded quick audio intros, I've used Quicktime no problem. Today I ran into a major issue, however and am having a hard time using the file in Audition. I was recording with an xlr mic plugged into my Zoom HR (I often use USB mic with no issues). I had the Zoom selected for intput/out. But when I exported the file it was multichannel, which prevented me from using it in RX7, Audition or anywhere else. In Audition, I tried to extract channels to mono files, and this at least let me get a file I could clean up in RX7, but when I dragged it back into Audition, I got this crazy mess (photo attached). Where did I go so horribly wrong? Thank you.