multiple service accounts

in my mogstation it says i have 2 service accounts, the first one that doesnt have any characters on it and the 2nd one with everything i use on it, including things like legacy and my 1.0 collectors edition stuff on it. i preordered heavensward and i want to use the code thing provided, but im afraid it'll be applied to the first service account like how my 2.0 beta code was, and i wont be able to use the things from it, what should i do? is there a way to cancel specific service accounts? and if i cancelled it, would it move the one i use to the 1st slot so things can be applied to it? thanks friends

I don't know if you can delete a service account (you'd have to contact SE directly for that), but they won't automatically apply it to an account, you have to select it yourself which one you want to enter the expansion code on, then it'll be added. So unless you select the wrong one, it won't be a problem :)

(Many people have multiple active service accounts so they can't/won't just randomly guess which to put it on, they have no idea and will leave it to us - at least they always have in the past so I can't see them changing that now)