Are you saying, then, that all physical healings believed (by a few or many) to be miraculous are in fact Satanic? Or a situation such as Pastor Richard Wurmbrand's "Sermons in Solitary Confinement" being heard, contemporaneously, by a Christian in Canada ... that was Satanic?
Perhaps I totally misunderstand you.
In the Bible, God says there will be many false prophets whose main goal is to divert people from the true Word. The Bible is meant to be enough to convince people of the Truth, but it was co opted by the "religious" in the early years because many folks couldn't read, and even if they could, they couldn't get their hands on a Bible. Finally, Gutenberg came a long and his first work was to put the Bible in print. There is no need to get confusing about it to be able to be saved, as many would have their "flocks" believe. The Bible speaks pretty clearly to those who will read it and take the time to study what it says, and to also try to do enough study to understand the original audiences so things stay in context. It's really an amazing book if one takes the time to look into how it came into being. I personally believe it is God's Word as He intended for us to have it made available to us and that there are no contradictions that haven't arisen out of misinterpretations, either intended or unintended to led people astray.
Have a good day.