I don't know if you knew the blocking policy was official when you blocked HippoHead, as you had not yet responded to my notification that the blocking policies were official now. However, you blocked Renee kelly AFTER you acknowledged my message that the blocking policy was official. You need to COMMUNICATE with users, especially since both appear to be new users. You didn't even ask either of them to explain their edits and tell them that they cannot make edits like they did. You just simply blocked them. The policies are:
C1 - "Any user who violates any rule will be given (a) warning(s) on their message wall before they are blocked."
C2 - "Administrators that find a user violating any of the policies must revert any changes and must politely notify the user of their wrongdoing."
B2 - "Administrators must follow the established blocking policy. Any exceptions require a community discussion."
B3 - "Any administrator who fails to follow the blocking procedures after three (3) warnings from a bureaucrat will be suspended for seven (7) days, pending discussion on the administrator's user rights."
That's one warning. It's better to communicate with people than to just block them. By communicating with users, they can either learn and move on and make better edits, or if they defend their wrong edits, you can tell them why they are wrong. If they revert the page, they are breaking a rule. If they harass you, that is another breaking of the rules. It will all depend on how they respond to your warning. It's better to give them a chance than scare them off.
Per B3 of the blocking policy, consider this your first warning. Of course if you have further issues with the blocking of Renee kelly and you could request a community discussion regarding the specific block per B2.