I have the similar situation. How I called the US Embassy in Georgetown Guyana to find out an update on the 30th of December, they told me it is READY; but can't not give me more information. I now noticed that my case status said it was last updated on 30th Dec. 2013, i now noticed that there added to my case number.
Do they update your status when you call or e-mail for information?
Do they ammend your case number?
My number before my call on 12/30/2013 was GEO2013xxxx28; after my call is it GEO2013xxxx28 01 GEO.
Any assistant is greatly appreciated.
Thank you