Say from Madurai to Chennai AC fare is 900 Rs and distance is 300 kms, and Chennai to Hyderabad Sleeper fare is Rs 400, and distance is 400 Kms, then as per telescopic fare rule u would have to pay for AC fare for 700 Kms, which would have been say 1800 Rs, but by giving u separate tickets, u have been saved money by the reservation clerk. If u provide fares paid by u and train Nos and classes of journey, it can be explained better..