My wife needs her own Apple ID, so I went to this webapp, which Apple has designed to let you know if you already have an Apple ID associated with your email:
It said my wife's email address was not associated with an Apple ID. Great! So I went to this webapp to create her ID:
But after I entered her email (and other info), it said this email was already in use or associated with an Apple ID.
So which is it? Does she have an Apple ID or not? If not, how can I find out how Apple is already using this email?