Yeah, the problem is often that there will be certain voices which attract different classifications by different groups of people. Be that as it may, it might be, in the interest of communication, expedient to classify generally.
The reason for not over classifying it this: Your singing ability becomes unduely restricted by your own perceived limits of your voice. These limits are the averages. You do not want to be satisfied with just being the average joe.
Just some of my random musing.
So to Dennis, don't get caught up with whether your voice is SUPPOSED to be able to reach those pitches in the songs of those particular artistes. Thats my best advice.