It looks like it's because you have authorized @upvotebank with your account's posting auth. This is owned by a spammer who upvotes his own comments with hundreds of small votes in order to scrape up a few pennies. Remove that account from your account's posting authority and also take the time to review other accounts from apps you may no longer use.

If you like to use PeakD I bet they probably make it easiest (I don't do account auths so I'm not sure). From your account profile page on PeakD, click on the Account Actions menu button in the upper right, click on Keys & Permissions, and then go to the Authorities tab.

After that, @hivewatchers or @spaminator should be able to get you off that list.