I dismissed myself when signing up here.
(strong atheism) I am almost positive, or entirely positive, that there is no god.
(weak atheism) I heavily lean towards the belief there is no god, without being positive about it.
Positive atheism (also called strong atheism and hard atheism) is the form of atheism that asserts that no deities exist.[1]
Negative atheism (also called weak atheism and soft atheism) is any other type of atheism, wherein a person does not believe in the existence of any deities, but does not explicitly assert there to be none.
Your first poll option is labelled strong atheism, but actually describes both strong and weak atheism.
Your second one implies a lower amount of certainty, but weak atheism merely states that it doesn't exclude the existence while not believing. This not believing can be very positive.
(agnosticism, pure) I don't know if a god exists and have no leaning either way.
No quarrels here

Oh wait, I have. I am a pure agnosticisticist. I am positive I cannot know whether
a God exists or not. (Key word bolded) And I is an atheist!
(agnosticism, leans to entheism) I cannot say if a god exists, tend to think a god may exist.
(entheism) I am almost positive, or entirely positive, that there is a god.
So, after I googled entheism, I got
The word entheism is used to consolidate the various ideas that ”God” is within (“God” as metaphor for ‘universe, nature, being, consciousness, ‘higher power’, etc..’
, which typically fall under the concepts of panentheism or pantheism.
And I went: Aha! Pantheism. My favourite flavour of
theism 
No sarcasm. It really is.
Here's where I noticed middle ground idea . Strong atheism -> weak atheism -> agnosticism and "agnosticism, leans to entheism" to (entheism). The order of poll options very much implies a gradient flowing from butch atheist to sissy atheist to I dunno, etc, etc.
While you can be a very positive atheist, theist or entheist and be a pure agnost at the same time.
Easily missed
So, now we come full circle and we are back at Ziggy dismissing himself with wasting effort, my time, goodwill, i-ink and yes, your time .
Actually, I never understood how theism and atheism are gradiental.
If one is certain, that's gnostic. If one is prone to believing one is more likely to become a theist. I don't see how you can be mostly atheist for instance. As I see it believing is an active process. You either engage in it, or you don't. But this is entirely subjective due to my lack of understanding about it. I am making no claims here about the truth of it.
Zealousness I can see as gradient.