Hi . . I can fixes these issues. First, related the mailchimp box, As far I know, they not often use nonce to validate the form. So I simply guess the problem because you're using plugin, or use an example secured form. For the second issue, I just need to retweak the theme to make it display the comments.
I can fixes these within few hours or even less. let me know if you are interested, If possible, I'd like to discuss further details related the issues.
Thank you and
Regards,
Shelingholmes