What is Your Approach?

[Faith No More]

In that case an agnostic atheist is exactly the same as an agnostic - you simply added an extra category.

One category denotes belief while one category denotes knowledge. To accurately convey a religious stance, both are necessary. For instance, one can be a gnostic or agnostic theist depending on whether they claim to know god exists. Some theists do not make the claim that god does indeed exist and are therefore agnostic.

Most people that identify simply as agnostic are technically atheists, however, I have met some agnostics that claim that that they don't even know whether they even belief if god exists.

As far as division of belief I don't see the point. If you're classsfying Atheist as a social group I guess its necessary, but thats not really helping answer the question. The word 'Atheist' comes from the Greek a- not, and theos- God. It is the belief that there is no God. This isn't complicated stuff..

Actually, the "atheos" is translated to mean godless, which still works within the defition I have stated.

Origin:
1565–75; < Greek áthe ( os ) godless + -ist

http://dictionary.reference.com/browse/atheist?s=t

Regardless, I find that irrelevant as language is not static. The word atheist has evolved to encompass not just those that deny god exists, but also those that are not certain but do not believe, since we have come to the point of separately labeling knowledge and belief.