This has nothing to do with @aggroed’s Steem Engine but there is an account called “steemengineteam” that has posting keys or access to other dapps posting authority for thousands of users.
If you see your vote listed on this post and you did not do it change your keys immediately until we figure out where the leak is.
Will post updates as figure them out.
Take this time to review your authorizations and remove what is no longer needed.