Am I tone deaf?

Dr. Dave, I've always had a problem choosing the key of a song, so I was thrilled when you posted the "how to" section during the intermeadiate lessons with Ryan. So I watched them a couple times took note and the first song I tried was Carey Bell "lonesome stranger"

Here's what happened:
I liked Method 3 so I used my "C" harp played each note and determined that "D" matched best so in 2nd position that would be a "G" harp. I played along to it and I thought it sounded pretty good, I needed work on matching the song but it seemed I was matching it ok.

To check myself I went to your page were you have the transcriptions with Lance. Well it says it's an "Am" played on "D"? I can't dispute that because it sounds allot better and everything is there.

Before I even tried this method I thought the song was "E" played on an "A" which in a bacward way matches the other thing you said about "if it doesnt sound good in 2nd then try the 5th" in method 2.

2 questions:
Am I deaf or just dumb?

Why is it I see songs in 2nd position on "D" harp listed as key of "A" and some key of "Am", maybe this is covered in the music theroy? I haven't gotten too far in those yet.

Thanks for any light you can shed I'll keep workig on it.