Few more users who has submitted their vote more than once:

mumang siat: He has submitted the vote two times. He also reposted his vote once by quoting it. He has deleted his first post and the quoted repost. Then submitted a new vote on 21st February and received 1 merit in that. (Post history)

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Mups099: The user has submitted the vote twice within few hours gap. However, he hasn't received any merits on his posts. After his first submission, he was informed by a forum members to not spam in the voting post as he doesn't meet the requirement. (Post history)

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sifat08: He has also submitted his vote twice within few hours. He has received 2 merits in his first post, which isn't available now. And he received 1 merit in his second post. (Post history)

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wtsimis: This user also posted his vote twice. Probably he has deleted his first submission as he was informed by a forum members that his vote won't be counted. He submitted another voting post on 22nd February when he has earned 50 merits. ‘wtsimis’ received 3 merits on his second voting post. (Post history)