The "Soundtrack Resonance" title applies only to the arrangement disc, which is the only disc actually contained in the jewel case. The second disc has its own title, "POWER DoLLS 1 Early Collection," and ships in a separate sleeve. I don't know whether or not the soundtrack disc always ships with the album, or if it's a limited edition bonus; there may be more information on
the website.
Thoughts on separating the entries? I've been doing this for other limited enclosures, like the
Illvelo bonus disc, but as I said, I don't know for sure if the case is similar here.