It seems that this expression (especially the wrong form of it) is spreading... I hear it more and more often.
Is this a statement on our society in general? That people could say something so contradictory to what they really mean, all the time, and not even realize it?
I know no one here on gfy would ever mix it up
but just to recap:
"I could care less" = you actually care about it, and you could still care even less if you had to.
"I couldn't care less" = you do not care about it at all and could not possibly care any less about it.