You are welcome! : ) I am not sure if the announcement is delayed for international applicants, because my classmate and I are international applicants and we don't know any domestic applicants so far. Maybe you can wait for their reply for some time. It may take some time for some schools to reply. One school replied to me after 6 days including a weekend.
My classmate may not accept it so far but he said he probably will accept it. He got an email talking about funding on 2/21. Maybe you can send an email to ask UNC admission office. Good luck!