Don't confuse a few sightings with a population, which requires documented breeding. There have been 2 recent magazine articles on cougars moving east, one in National Geographic and another in Field and Stream. Both mention that all sightings east of hte Mississippi (in the US anyway) are males.  Like bears, males wander very far but females tend to form home ranges near where they were born. So, male-only sightings are NOT reason to extend a range map for the species.