I can imagine how this album was created.
Ayu: "Ok, with this we have 5 songs. We need at least the double of that amount."
Max: "yeah, otherwise we will get in trouble"
Ayu: "That's genius!! Let's get in TROUBLE"
What if every song has actually a second hidden track like independent+? That would be consistent with the Double concept. lol Do we know the total amount of the minutes of the whole album? But well... Ok, let's not get expectation that high...