Mistress Iside and her friend had a problem with this slave because he was delusional. He did not listen to the mistresses and he always did his own things. And the mistresses wanted to tame him so they used their high heels to trample him and make him cooperate with them. The slave felt pain and he realized it was time to change so as to avoid such humiliation again.
Mistress Iside and her friend had sought info from this guy and he did not bother to find out what it was for or to verify the accuracy of it. The mistresses used it to invest and they burned their fingers. They were so angry at him that they double dominated and punished him because of it until he had to give them back the money they had lost as a result of his bad advice.
This guy was undependable and mistress Iside and her friend had to punish him. He had to be made to be dependable as it was not a desirable trait to be undependable. He was trampled and crushed on his head to pump some sense into him and by the time the mistresses were done with him, he had learned his lesson and he agreed to do things better. He was warned of dire consequences if he did not.