With regards the sync to Steam, my understanding is this is irreversible, prevents you from playing on other platforms with the same account and characters, forces you to buy all expansions through Steam and not elsewhere, forces you to launch the game with Steam (rather than launching it in a way that doesn't show or while Steam is closed). So there are people who regret doing it, certainly.

I don't know about the subscription issue. It does look like you have one, but it could just be showing the free 30 days you get with the standard or complete editions of the game. Maybe it is just taking some time to update, but it should be more than a day at most and often I have seen lodestone updates be as quick as 1 to a few hours.

You could check your email because it sends an email saying "Payment Complete" if successful.