Why is Damiete Charles representing us at the Miss World Pageant?

Damiete Charles Granville was 1st runner up Most Beautiful Girl in Nigeria 2012, and that automatically qualifies her to represent Nigeria in the Miss Universe pageant. But when you go to the Miss World WEBSITE, she's the one there as Nigeria's rep. What happened to our queen MBGN 2012 winner, Isabella Ayuk? #justasking!