When I'm on the ASUI screen with an app open, and press Home key, I get the system Home menu overlaying the second screen and it remains in place as I switch between ASUI screens. The menu can't be cleared or activated until ASUI screen is closed.
Remain Lit When Charging is not working: the display continues to dim, then blank, after the timeout. The setting on the ASUI 2nd screen mirrors/changes the setting in the Display Control Panel.