So I sold my 16gb iPhone 4S and wiped everything off my iPhone. But I still see it on my ipad but can't located I guess. Do I need to erase manually ?
I would try to wipe it, to see what happens. If you want to be safe always restore and send it fresh with no backup.
You might have to do it on the web site on a computer.
If you bring up that exact same view on a computer there will be a little 'x' in the highlighted part you can click.
I dunno...I guess they didn't add that to the iPad app?
Weird.