23/11/2017 is the new expiry date for "old Golds" (i.e. members who had Gold at the time of the changeover from the old to the new programme in November 2014) who have maintained status ever since, and who have already requalified for next year prior to the end of the current membership year (ending 22/11/2016).
This is as expected; nothing has changed.
You will receive a physical card with this extended expiry date at some point around the expiry of the current physical card. But the "virtual" card is replaced immediately.
(This was not really worthy of a new thread, I think)