There’s a lot going on here.
For the game/movie/TV rips, I think of them like a live concert bootleg. Those don’t get put in with the official release at all. They’re essentially a new recording from a potentially different source.
A bootleg that is a direct copy of the official release of a soundtrack is usually an almost exact copy of the original release and should be kept in the same group (for example, this is a traditional bootleg of this and they are in the same release group).
Samplers and mini albums are distinct releases and should be kept in separate release groups from the main soundtrack.