I've just renewed Gold and yet it said March 2017 expiry.
It has random single legs of return flights in my record (ORD to LGA but not the LGA-ORD which got me there) - and so on. No mention of Gold renewal. Gold bday bonus showing 0 miles added.
All buggy and weird - although I think my mileage total is correct, just the breakdown is off. Waiting a little while before bothering them, I don't need to book anything - but people, please advise if you're seeing automatic fixes and corrections... ta!