Yeah. I think that Charming and Snow are King and Queen of their kingdom by the point of Emma’s birth. Midas is a separate kingdom. They seem to be more like city states.
Snow did say in the pilot when the Evil Queen crashed her wedding, ‘She’s not a Queen anymore!’ So I think when Snow married James, she automatically became Queen. That was my feeling anyway.
Since we didn’t know about King George at that point, maybe there was a coup d’état to de-thone George and hand over his power to James.