Hmmm. I never realized that Chopin wrote not one but
two Nocturnes Op. 15 No. 2.

The first line should of course be Op. 15 No. 1.

And unfortunately, the mistake is repeated on the outside
back of the CD — probably because they used the same plate.

What I really can't believe is that after spending over
a decade in the printing business that it took me so damn
long to catch the typo. But hey, like, I was really into my
music, man….