Have you ever been awarded " o "points for answering here on Yahoo Answers. I don't understand why it said that.?

You get 0 points when you answer a question you have asked.

It will say you have earned 0 points when you answer a question with a Best Answer already chosen, but the 2 points are added to your total points.

That was tested to give better answers instead of nasty comments about others.

I'm not aware of it as I don't keep track of points,that's rather sad to see people knowing exactly how many points they have.The only time you get no points is when you answer your own question.

Yes and no points are earned for answering your own questions or questions with a BA already chosen.