No, they don't call, in worst case they will call, otherwise no,
in my case my wife did not come for interview & also they didn't call her, my interview was just like 7-10 min only
Yes, its normal lots of people didn't see update Approved message in gckey and their passports dispatched to their location,
check your gckey regularly,
Mine was sent to me yesterday to my location, may be today may be tomorrow i'll get itt,
in my gckey i can see my counterfoil e-COPR, document number & expiry,
my pp was under process on April 26th and dispatched May 03rd