Recently I reviewed a post on the Hinduism site and found that it is actually spam. When I flag it as spam, it showed a -1 vote to the post. This usually happens whenever you flag a post as spam, it gets -1 vote (one vote down).
At first I thought that -1 vote might be given by Community ♦, but if the same post is flagged as spam by another user then one more -1 vote is added to the post (-2 votes) and, according to voting rules, the same user cannot perform the same vote cast for the same post (i.e., a single user can not upvote/downvote a post twice/multiple times).
So who actually gives -1 vote to this post?