You're right. We apologize for taking 24 hours to update the fingerprint of the new checkmyhttps.net server certificate.

Reminder: If you don't trust our check server (checkmyhttps.net), you can use your own. See https://github.com/checkmyhttps/checkmyhttps/tree/master/server-php

We have reviewed the SSLlabs comment. We've just updated the certification chain certificate. All's well now: checkmyhttps is rated A+.