I have to agree with you on this one. The part they repeated was the dream sequence not the earlier. It was bec of jai catching PS together that led to the fear of Jai telling Bani and Karuna disclosing Pia's secret. The entire episode is open to interpretation where the dream starts and where it ends.
I feel Pia is nonchalant about Karuna knowing about he drugging. Shouldn't she be worried like hell. Esp since Karuna is not blackmailing her back. Actually remember Karuna offering Saahil a business position. Maybe Karuna put Saahil up to meeting and abeting Pia. Then the question would be what is Karuna game plan with Pia and Saahil.?