I think the reports you used don't display all votes in a correct way - @buildawhale has been used for both:
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I understand you can't just decide that you don't like the content and remove the vote - But why can you not blacklist them for the future?
There is no right to use boosters. If you have a company you don't need to approve of every customer.
However thanks for your answer and your great work with the many other spammers ;)!
RE: Just another day on Steemit, why I feel helpless.