as I wrote, you receive upvote from them when:

@power-down - when you have active powerdown you don't get doubled vote

@steemhive-images - when you add a post from another blockchain (copy/paste) you don't qualify for double vote from my account

@delegation-out - If you have delegated part of your BLURT POWER to another account then you will not get a double vote from my account. Everyone should invest in their own accounts!