As I understand it, SSM marriage is technically not legal anywhere in the U.S., even in the 11 (or so) states that have passed laws "legalizing" it.
Check out
Cooper vs. Aaron.
States cannot pass laws that attempt to nullify federal law, and should be considered ineffective.
Since DOMA is technically the law of the land, any state laws passed subsequent to DOMA that attempt to contradict it are legally ineffective.