By the devs own admission, they're stuck in a "time bubble" in a sense. They're all exactly where they were we finished the zones. Meaning the Castrum in Mor Dhona is still occupied by Garlean troops ready to attack us, in terms of a zone sense. But in actual lore sense, as told by the RPR story, they've been engaging in trade (in a sense) with Ul'dah. They sell Ceruleum to Ul'dah for profit, and then buy things from elsewhere (likely Mor Dhona or the Garland Ironworks). Because while Ul'dah has rules to not sell to Garleans...there's nothing about BUYING from Garleans.