The account was reported recently for comment spam. That's why it is blacklisted and received adm downvotes.

Steemcleaners account is a private account now to which few users have access including former Steemcleaners members.

It has no formal connection with Hivewatchers.
Some of the users who have access to Steemcleaners accounts use it for downvoting privately. Some downvotes may overlap with some downvotes on the accounts blacklisted by HW.