As I was uploading contacts into the list and individually adding the comma after each... I was thinking to myself "there has to be a better way" but the Kajabi support page didn't clarify the issue too much, so I set about finding a workaround, and here it is.
Watch the video to see how I simplified my life with this little formula:
[Cell1]&" "&[Cell2]
If you are having any trouble applying this formula to your work, feel free to reach out and let me know.