"Live Free or Die" is the 71st episode of the HBO original series "The Sopranos" and the sixth of the show's sixth season. Written by David Chase, Terence Winter, Robin Green, and Mitchell Burgess, and directed by Tim Van Patten, it originally aired on April 16, 2006.
"Live Free or Die" had at least 80 episodes of The Sopranos to air on HBO before it.
There were not 80 episodes of The Sopranos to air before it because it was the 71st episode.  The system probably had trouble with the sequencing.