Bizarre...
I bought a CD of Bach's sonatas BWV 525-530. There was something weird about the way they came out. I looked up the program (I was using my computer to play them) and I found out that for some reason they were being played in reverse - from the last movement of BWV 530 to the first of BWV 525. It's a funny old world, and it hasn't got any less funny since the introduction of computers.