That removing the cookie resets the captcha is hardly evidence only the cookie is being used as evidence. They were humans using the captcha and Google recogniz

That removing the cookie resets the captcha is hardly evidence only the cookie is being used as evidence. They were humans using the captcha and Google recognized it. I would imagine a few bot requests would be allowed to follow a human solution since you've raised the "I'm a human" value pretty high, but that value would decrease on every request.