Hi McCree79, The Westminster Confession of Faith, Chapter 3, part one. "God, from all eternity, did, by the most wise and holy counsel of His own will, freely, and unchangeably ordain whatsoever comes to pass: yet so, as thereby neither is God the author of sin, nor is violence offered to the will of the creatures; nor is the liberty or contingency of second causes taken away, but rather established."
Calvinism does indeed teach God causes, predestines and ordains everything that happens including sin. Then, they say this does not make God the author of the sin He predestines. I provided a quote to support this statement of fact.
Your view is not Calvinism, it supports the idea that God either causes or allows whatsoever comes to pass. That is not exhaustive determinism.
Let me ask you this simple question, God knows the future exhaustively and perfectly. Whatever He knows will occur, must occur. Nothing else can occur. Therefore everything, including our each and every sin is predestined by His knowledge of the future according to Calvinism.
And I am not attempting to represent John Calvin's view, I am representing the views of "Calvinism" which does not always agree with John Calvin.