To be frank, after reading your reply I'm still not 100% sure what the policy is. What are the situations where there are 30 days of notice? How does that interact with hourly billing? If I'm a week through the second month and cancel, does that mean I get charged 2 months 1 week plus the setup fee in total?
I'm a big fan of Hetzner and have used it off and on for ten years now, including auction, dedicated and cloud. I've had very few complaints over the years. But I stand by my post above - the information on your site is not clear and contradictory, and really needs to be cleaned up.