Dual Monitor Issues

Not sure if I may have missed this thread already, I am running dual monitors and it doesn’t matter if I play in windowed or full screen, whenever I look to the left in the game it still moves my mouse cursor onto the second monitor and causes me to click out of the game and back to desktop. Any advice?

Im running dual monitors without any issues, make sure you’re clicked in the rust window making it active.
Im running on windowed mode with it being as large as possible on 1 monitor

Thats what I am doing but like i said, if there is a zombie to the left and I need to turn and shoot it, by looking left it still moves the cursor unto the next screen, then by trying to bring it back it turns me to the right.