I wouldn't purchase that way after seeing so many struggle with revoked, later learned to be illegitimate codes on the base game and EP/SPs. But if EA has already confirmed that the code is legit, I would say you have nothing to worry about. There were store-related issues with BB in the past, something about confusing the "Complete Adventure" set with the standalone world which, at least at one time, were offered as two different products for sale.
I can check later, but am pretty sure I've seen worlds show up on the wrong tab in the Launcher. It's meaningless.
