on the neowing website it implies that some other tracks have been remixed as well...

2 appears (H/\L'S Progress)
5 TO BE (2003 ReBirth Mix)
7 M "Original Mix" (H/\L'S Progress)

so like, i dunno, if H/\L have drastically changed [appears] + [M] thats only 5songs that have already been released, the rest is 8new rmxs & 2new tracks...

reference - http://www.neowing.co.jp/detailview.html?KEY=avcd-17278