Reused OST Tracks?

Okay, maybe I'm crazy here, but I swear that I've heard some of the tracks listed here with no known locations or as "old theme" have been reused in places in the game. Can anyone back me up on some of the Volume 2 and Volume 3 tracks? In particular I could swear I've heard Light Fog, Waves in Time, and The Embrace of Sands from Volume 2 somewhere currently in the game.

What I'm less certain about is some of the tracks from Volume 3 that say they were the final or opening cutscenes for pre-Enchantment seasons, and perhaps it's merely familiar motifs that I'm hearing, but I can't help but feel like I've heard those tracks repurposed somewhere else in modern Sky. Any sleuths with ears for music who can debunk or validate my suspicions?