You can only take part in second counseling round if you have regiater for counseling and pay the registeation fees of counseling even if you miss the first round. But the registeration is must, without registeration you can not take part in counseling session directly in secound round and not even in first round also. And the crrtificate verification is done bedore the counseling starts. And it is done only for once only. So kindly be sure of this thing. All the best have a great future ahead.