Why Meenal & Amey in bottom 3?

I don't understand why Meenal & Amey are in bottom three? Every one should vote for Amey & Meenal and also for Karunya. All others are not worth it. Don't waste your time giving votes to others because they will loose sooner or later. I don't understand how Ravi & Sandeep are surviving without even getting into bottom three, or is this a gimick that Sony Entertainment is doing to entertain people so that they can keep watching the show!!!!