This is what it looked like before v5c:
(https://s15.postimg.cc/afl23qnsr/ctf-mapcard.png)
Funnily enough, I was the one who originally reported the error (https://cutstuff.net/forum/index.php?topic=10934.msg336143#msg336143). I correctly cited the song title and proper source, and yet they still screwed up the correction.
Fun bit of trivia: RushJet1 originally made the music so he could dub it into a course he created in the original Super Mario Maker (the servers of which are shutting down at the end of the month, so no more free alternative to Super Mario Maker 2's course world):