I've seen that kind of chart dozens upon dozens of times during the many decades I have discussed this topic with people who call themselves atheists...and come away thinking they remind me of the Libertarian Chart whih is designed so damn near everyone will end up thinking they are libertarians.
I do not "believe" that any gods exist, but I am not an atheist.
I also do not "believe" there are no gods, but I am not a theist.
The chart is...(substitute here whatever you will) bullshit.
I say again: If you actually did put much thought, consideration, and examination into it...you would have determined that you do not "believe" there are any gods AND you would have determined that you do not "believe" there are no gods...which is to say you would have arrived at agnosticism...not atheism.
Atheists have decided to hijack agnosticism (the so-called weak atheists)...I suspect because they want to increase the intelligence level of atheism.