Have you tried closing your right eye? It seems for some reason they are using the non-dominant eye (usually left) cursor position as default. I have bad vision in my left eye but sometimes i have to close my right eye to be able to “aim” correctly. This seems to work correctly in XPlane for example where I’ve never had this problem.
It might be what you are experiencing, or it might be unrelated, just wanted to check.
I posted a bug about this way back. Still seems to be an issue: