Those messages mean you are mining. Don't expect to find a block anytime soon there is currently a miner using an exploit to give himself a huge advantage over all the others combined. If you look at the witness page you can see all the similar miners are his. https://steemd.com/witnesses
One more thing. Are you using miner version 12 or version 13.
Where can I find version 13
https://steemit.com/steem/@btcbtcbtc20155/steem-windows-wallet-and-miner-v0-13-0-released-need-to-update-to-mine
Again!?!
Shit, I thought we'd put a stop to that.
Oh, I know which miners you speak of.... What a pain!