I think it's likely the producers knew it was likely she wasn't going to make it after the votes, no matter where they put her. They see the individual performances of each contestant during their final dress rehearsals on stage. That's when they decide the order of performances. Start out strong with Tyson, end big with Iam, put We Ani after the mid-point, and make sure Warren and Colin aren't singing back to back, along with any of the other country singers. Intersperse the different genres & types of music.