This has been a common trend to call for interview after dropbox.. Just carry all the required documents and you should be good. Nothing to worr...

That means the passport is being delivered to consulate. I guess you might have submitted your passport at VFS office today?

Yes..Since the status has been changed to Issued ,your visa has been stamped on the passport so it is safe to book your flight ticket.

You should have received email or text message on your cell phone number provided to collect passport.

Use this link... https://ceac.state.gov/CEACStatTracker/Status.aspx?eQs=WwjqOlbeRYzCYubaSQI+RA==

Yes..Passport is ready for pick-up