so carmen theme is different then "resonsive" which would be found under "Themes" on this wordpress.org
Yes. The Responsive theme hosted here is completely free and has no association with ThemeForest. Completely different themes and theme developers.
I am a little confused as to why this "Respnsive" Theme on WordPress has that name, when I have observed that that is a general name used to describe a whole plethora of different themes with fluidity and that are mobile friendly.
Well, the term "responsive" isn't trademarked in any way. The theme here was one of the first responsive themes submitted to the WPORG Theme Repository and its developer simply chose that term as a title for it. As no other theme in the Repository had exactly the same title, this wasn't a problem.
You do get these name clashes sometimes. I help to maintain a popular ecommerce plugin that has the same name as a totally unrelated ecommerce theme - which can cause the odd spot of confusion but, at the end of the day, that's just... life. ;-)
Bottom line - if you paid (or might pay) for a theme, we don't support it here. If you've already bought the theme, then you've paid for support from the vendor - so do get your money's worth. If you're thinking of buying a theme, direct the questions at the theme vendor/developer again. If they're motivated enough, they'll answer your questions. If not, it begs the question - how well will they support the theme? Either way, we simply won't know the theme as well as they do.