As u enter from Chandni Chowk Side onto main concourse area, u enter PF#8 and not PF#1 or 2 etc.
Ok now from main concourse, towards left, u will find PF 1,2,3, 4 and 5 as branch lines or Island type Platforms with dead ends as seen in first snap.
Similar is for PF# 6 and 7 which are on right side from main entrance (snap#3), PF#8 is the longest one which is been used to accomodate most 24 coachers.
now...
more... for PFs 9 to 16 u have to climb overbridge and the numbering runs serially..(snaps # 2 and 4)