Dear Hive account@crypto.piotr, that theft of votes may be possible in some cases but since you registered on steemvoter.com no problem is simple as it says Hive account@reggaemuffin you have to disable the account, that is the solution.

As steemvoter.com belongs to Hive account@buildteam that has several similar projects like the ones you mention from Hive account@dlease or Hive account@steemsports, so you gave him the authority to do it, so there's no problem.

It seemed strange to me, but when investigating and reviewing my last activities and I don't found nothing suspecious, I suppose it would be what Hive account@reggaemuffin says and that's it, I also think that Hive account@devann should share his experience of vote-stealing since he was not registered on steemvoter.com and that is very strange.

Thank you for reading!