Theded1440, I checked my script again and I saw the brightness installed from correct location:
dpkg -i /opt/N9QTweak/Toggles/system-ui-brightness*

and only music control and status updater installed from Toggles2. this mean it's correct..
The music control installed in hidden mode, it appear only when you start to play music.
About the closed app when you install it in open mode, Coderus told me it's known issue in open mode and it is not related to the unrestricted sys-ui or applets.