Hidden Palace Conclusion

Now that the Sonic 1&2 Soundtrack has been released and I've heard it, we can see if it resolves any of my questions about Hidden Palace's BGM. And guess what? Not only is the song not titled Hidden Palace on the soundtrack (it's called "Unused") but it actually has an ending unlike the original game. That goes a long way to confirming my theory that the song was not composed as a zone music. I'd say more, but I'm using a phone to post this. =)