Amazon MP3 Downloads

Ua, oops? I was purchasing songs from Amazon.com MP3 Downloads and this was in my bill. Yes, I did download The Door's Riders on the Storm but I never knew The Pet Shop Boys did it too

Riders On The Storm [MP3 Download], Price: $ 0.99
From the album Greatest Hits [1996]
By: Pet Shop Boys
Sold by: Amazon Digital Services, Inc.