At chunar ticket counter, distance between Chunar-CAR and Patratu- PTRU is set wrong as 513 km instead of 443 km.
Distance to Barkakana is correctly set as 460 km.
I complained on the website and just look at the response they sent :
' Sir, actual distance between chunar and patratu via mgs,gaya is 443 km. but via chopan is 510 km. regards.'