I'm noticing the same thing. Massive Attack's Teardrop is supposed to replace the other theme song in season 2 if it's a U.S. run of the show. Apparently, in the U.K. and other areas, they did not use Teardrop because of licensing permission. Also, the dvd version doesn't use Teardrop. The Netflix version must be from one of those regions because I haven't heard it yet, and I'm past season 2.
Answered Apr 10, 2014
Edited Apr 10, 2014