hello , bstrail i dont think such mis votes has ever happened in steemdb and steemdb as well don't have your private keys , are you sure you haven't followed some trail accounts that might have executed the voting round .
If that's the case then i will have to check manually and that is hell of a job to be done . why don't you hop in our discord server and explain a bit more about it

I will see if there is a bug in steemdb

https://discord.gg/psHEdsK

P.S our team manages https://steemdb.online and we haven't seen such activity ever