Sana my sister 🤗 🤗 ur thoughts are same as mine. The one with merchant was the duplicate and other all places it was real. This is Ranveer twins only and is back for some revenge from his parents, like EK pull in her every show, that the child who is been separated from his parents in his childhood, grow up and come back for revenge. She did same in many previous shows of her, like Ansh in KSBKBT and Prem in KZK. This headache thing, I feel is not the twins effect, but is a trick pulled by CVs to confuse us, that we think both are one only, while original one is just having a normal headache. I even feel so that duplicate is just negative but not cruel, he is just here for revenge from Ranveer and family and will destroy his business, but I doubt that he will try to misuse Ishani. At the end they will join hands, kamba will explain him the situation that for what they have to leave him, and this his headache could be a sign that he is suffering from brain tumor, and once everything will settle down, he will die, coz when he will die than only this track can end.
This Kailash thing I said yesterday only that the day changed in yesterday epi itself, but they didn't show us Kailash meeting that guy, who was calling him to meet.