Look, it's pretty damned simple. I have a laptop. I have an external monitor. The monitor is to the left of the laptop. I have the monitor to the left of the laptop. I have "Extend my display to this monitor" enabled so I can have two displays at once.
Then why is it every third day or so, I have to ****ing remind Windows "Hey, dumbass, the monitor is to the *left*, not the *right*?" Come on - I don't move it. It's not a new monitor or docking station.
Get it already!