Question [Q]Turn WiFi off with Screen [Wifi Sleep Policy]

I have selected the option "Never" in the "Keep WiFi on during sleep" but still my battery history shows a long blue line under "Wifi" regaurdless of the "Screen On" bar.
I tried turning off the "Scan always Available" option too, but the problem still exists.
I problem persists in all the 4.4.2 ROMs I have used, including stock.

Is this a bug? or did I miss something?