What does YOUR Agent say; or are you relying on the Listing Agent to represent you?
Remember that a VERBAL contract isn't worth the paper it is printed on!
And the Seller/Homeowner, in a Shortsale, is, at best, a "rubber stamp"; they have no authority.
CITI will play their cards close to the vest, no one has any idea how long, or if it will happen.
This is the nature of Shortsales; I'm sure you've been told this.
The Banks are very uppity lately; they are just as likely to refuse your Closing Cost.
Good luck and may God bless