Dear Christie,
I had the same problem. What happened in case was this: the URL I
submitted had "www" in it so that's what's in their records. But when
I did a copy & paste of my URL while trying to submit my article, it
ends up "www" is not part of my URL. I tried again, adding in the
"www" and all went fine. Maybe this is what's happening to you. Good
luck.
Liz