Headphone thought that my Headset was a Speaker

Well that is normal, for the system to act like headphones are speakers as they actually are a form of speaker. So what you are saying doesn't quite make sense.

What is happening exactly? What are you trying to do and what message(s) are you getting?
 
That is not the same. are you talking sound coming through the headphones or coming through the mic? Those are two different things, even if they are on just one headset.