I was having issues, so I left the host up for 24 hours. Who knows if I can query it, but I found when I added it to Steam's Favorite servers, I was using the wrong port. I assumed it would connect to the game with the game port. WRONG. When I used the query port, 13657, it added and shows port 15636. If you're having trouble and everything else seems like it is working, try that. If it doesn't work, let it sit for the night and then try again.