Basically when my mouse goes top right, it disappears, as if there was no border. My windows are sized correctly and I have the right screen resolution. My drawing tablet is also acting as if my screen was larger than it is.
Never mind. I turned off and on the first screen setting toggle and now things just work. I also adjusted my tablet so that it follows the screen by going into Wacom Tablet settings, Associate to screen and clicking the "associate to one screen" check.