Monitors freezing when switching to desktop

I am using three monitors, 2 Asus VE228h, 1 Samsung Syncmaster t220. The Samsung max resolution is 1680x1050 connected with active DisplayPort to DVI, the Asus are both 1920x1080 one connected with HDMI the other with DVI. The problem is, if I set both Asus to 1920x1080, and I am on Windows 8 Start screen and scroll over the desktop in the preview pane on the left side of the screen, or if...