The First Six Joker's Cards Boxset will be on 8 discs?

The First Six Joker's Cards Boxset is coming out on December 17th so... it's only one week left and we still don't know nothing about it. I thought it was postponed so I did a little research and noticed that every online store still have December 17th as a release date. On the other side, I found out that this boxset will be out on 8 discs! You can check it out RIGHT HERE. So if it's true, my guess is the Joker's Cards will be on 7 cds and this extra one will contain bonus unreleased tracks or something like that. What do you think? Comment below!