Surprised how few people have this game! I was sure I'd come back in a few days and someone else would've beaten me to it.
Anyway, here's your answer: It's the "same" on a legit disc. I say "same" because track 25 is the intro music, which starts low and gets louder by design. If your version doesn't get louder, that's strange, but yeah, otherwise that's what it does. tracks 26 and up are nothing. I remember thinking this was weird back in the day because of course the game doesn't have 99 cd tracks, right? They just made the menu without taking into account how many tracks there were because it was easier. I even remember looking through them all to find something "hidden," but now I recognize they were just taking an easy road
Also there are 31 tracks on this disc, yes, but some is data, and some is cutscene/VO stuff, and they just didn't include that stuff in the "CD music" section, so you wind up with 25 tracks.
So I'm gonna say your rip is working as intended, unless somehow your track 25 doesn't get louder after the first 5 seconds, but that'd be a real weird specific thing.