Snow White doesn't know who Emma is, at least not yet. I think Henry is aging because he wasn't sucked into the vortex, he was born outside it. I think the Queen can leave the town because she joined of her own free will to "lead" the town rather than being "in the curse". I don't think Granma knows who Emma is, only Rumple and I think the Queen knows too. Remember, she first offered the apple cider, lol.