The brand new 1.21 music discs, such as Creator, Creator (Music Box) and Precipice are sorted in the wrong order, even mixing up with the older C418 music discs such as "wait".

My suggestion is that those 3 music discs should've been sorted after Relic or 5, which was the newer 1.19/20 music disc, but before "Pigstep", as Pigstep is considered to be a Nether music disc and not overworld ones.