Hey there,

Hope you are doing great. NO, you need not register for round 2 again, if you had already registered for round 1. The candidates who haven't registered for round one, can only register for round 2. Also, you should only pay for once for the counselling rounds. There is no need to pay for each and every round. The fee you paid for first time is enough, until you are allotted seat at any university.

Hope it helps!