I would not fly through India.
Like @nozzs mentioned, you are given your luggage back and you have to re-check-in the luggage. 2 luggage are not allowed and you are supposed to pay around $100 to check-in 2 luggage (This has happened to one of my friend). Plus forget about duty-free alcohol, they confiscate it saying they don't allow Alcohol in the flight even if its duty free.