To be fair here, the whole agnostic thing is something that a lot of atheists on here seem to struggle with as well.
NS, you mean that some atheists treat agnosticism as a half-way house more or less exactly in the middle of some scale with theism at one end and atheism at the other? If that's what you meant, I can only say that I've only ever seen this at work in one person who's not a theist; for the most part I've normally only ever seen it from theists. Most atheists seem to be aware that agnosticism and atheism refer to two entirely difference spheres, and are entirely consonant with each other.
I fear we have the evolution of language to blame - the common, everyday meaning of agnostic which is so prevalent now is a million miles away from what Huxley intended when he coined the term. As nice as it would be for us fussy old-guarders to put the genie back in the bottle and have the word used in its original sense (and people using
disinterested and
uninterested properly as well!), it's almost certainly too late.