User blog comment:Udarsha45/Tite Kubo recives an award for reaching 600 chapters in Bleach/@comment-5398287-20140627025144/@comment-1351982-20140627132752

They are probably including those chapters and the other negative flashback chapters, hence why he already has the award. Otherwise he wouldn't get it until early December. But they will probably do a big color spread for the "actual" chapter 600.