premise: "Cover on My Heart" is a pop ballad performed by Guy Sebastian and is the third single from his third album "Closer to the Sun". Sebastian announced that this song was the album's third single in April 2007. The single was released on 28 July 2007 in Australia, set by his record label Sony BMG Australia. Sebastian performed the song on various programmes such as "Sunrise" and "Rove Live".
hypothesis: Guy Sebastian set the release date for his single Cover on My Heart.
reason: Although Guy Sebastian announced that "Cover on My Heart" would be a single off of his album "Closer to the Sun", the single's release date in Australia was set by his record label, Sony BMG Australia. It's possible that the system got confused by the word set and considered it synonymous with announced.