Thanks all. By contacting the organizers, I learned that my first session choice organizer had never officially "rejected" the paper, so it was never available to my second choice or to the round table organizer. The second choice session is already full, but at least I should now make it to the roundtable.
I submitted a paper for ASA in Las Vegas this year, and have not heard back. I know of some people who got accepted to present in sessions, but don't know about rountables yet. Has anyone gotten a paper accepted (or rejected) from a roundtable? My paper still says "Under Review at [Name of Second Choice Session]" Is anyone else still waiting to hear back from ASA?