I think sir you are correct..
In some youtube video many months back i have seen that in 1 line towards the left end when you travel from rourkella side towards howrah then on left side in Chakradharpur yard side there is 1 line with raised platform and Howrah-CKP pgr was kept parked there in day time...that is before introduction of Ckp-Tata pgr spl time i am talking of. I have seen that video many months back now i remember and that narrow raised platform with 1 line looks exactly like Pitlines in ckp......so i can relate that to your reply...i think you are correct. But experts can say better whether 1 pitline is actually there in ckp