Alt-tab used to appear in whatever monitor the mouse cursor was hovered over on in version 10.0.0. But after the upgrade, alt-tab stays on the most recent monitor you were active in (a.k.a the display you last *clicked your mouse in) until you click on something on the separate monitor. Even then, it takes a few moments to adjust. If done too quickly, it still opens alt tab on the other monitor. This is most definitely a software issue on version 10.1.1 as this issue have been fixed when I reverted back to version 10.0.0.