Upvoted! So sorry to hear of your Cheetah issues. My Steemit account for geopolitical writing @rusticus had many of my posts flagged by Cheetah, even though they were my own content copied over from my blog!
My issue with Cheetah is not that it flags duplicate content - that's a valuable service. It's that Cheetah has no way to distinguish open source and creative commons work from copyright infringement.
My writing, for example, is under a Creative Commons Attribution Share-Alike Non-Commercial license. I WANT people to "steal" my work and post it everywhere, but Cheetah stops them. In these cases, it's actually Cheetah that is in violation of my own copyright!
I like the sound of that, cheetah in violation of your copyright.