I thought the same, that its got a bit of a KHNH twist to it, but as jyoti said, Dev isn't dying, so nothing of the sort can happen. But he thinks he's dying, so he's got the same intensions as SRKs character had in KHNH.
And yes, the sidh baba thing confused me today too - that what Ameesha said about Kaju dying was true, but then I got to thinking, and this sidh baba said all this stuff 2 years ago, so maybe this "kanya" that was supposed to give her life for Dev was Payal - and she's already dead, so that would mean Kaju is safe, but then if this is true, why is the mani/bhavishyavani still having a negative effect on Dev's life? Its all very confusing, and the team needs to start explaining SOON!