My girlfriend has a Barbie collector doll (Edward) from the twilight series that is unopened and was packaged in the "Bella" box. The only obvious difference is the name printed on the box, however when she contacted MATTEL it was discovered this box has both "assortment numbers" on the packaging. One assortment number is for Edward doll the other for Bella doll Does this make this doll worth more? Does anybody know how to get this doll authenticated?