Oh I just realize that the 3-pack CD have totally different track in each of them (KISS , Dragon Ball Z and Seishunfu).
It's totally different from a pile of same CD with same content. I still don't like the gimmick concert but I can tolerate this better if I just think of it like Day-1 and Day-2 concert DVD.
^it's indeed intended as a multiple pun, and they're referenced in a way or other in the album. ----- Interviews with Miyamoto by BARKS, but most of it was being talked about in NHK documentary. http://www.barks.jp/news/?id=1000112199