You're spot on regarding the special tracks. "Ka-ching" and "I Feel Pretty" are both songs she sang for her birthday fan meet. "Ka-ching" came first, and the other last year, I think.
So that's why. They aren't new tracks nobody has heard, they've just not been released officially like this yet.
I like the last two songs, but when you know, why they added them, it does make sense they're not the same vibe as the rest. But I'm thankful for getting them in good quality without ReVeluvs cheering haha. 😂
And Irene ate down on this album 🤌🏻