Package mozilla & Two Versions ??

[gustavo halperin <ggh.develop@gmail.com>]

Hello

Why when I search in the current version for Mozilla in Debian 
(http://www.debian.org/distrib/packages#search_packages) I receive two 
possible versions, one is 2:1.7.8-1sarge3 and the other is 
2:1.7.8-1sarge7.1 ??

  Thank you,
          Gustavo