ASUI overrides the control panel setting so it can perform all four locking modes no matter what your settings are. When the screen comes back on the settings are restored but if ASUI is killed, restarted or the system shuts down then ASUI doesn't restore the values.

I'll work on getting the shutdown and battery_empty signals to restore state and maybe also save the original values in state settings and ASUI can restore them on next start if it is killed. In the mean time, there are two buttons on ASUI's secondary widget page that toggle those settings without requiring a trip to the control panel.