What I can guess, SGVO attempted to clear atleast few files from Mid march to April of FSW13 applicants....
On that time they completed the initial review of most of the FSW13 files....They requested additional documents to several applicants too..
But later, they changed their mind/decision and proceeded with backlogs....
And now they are processing the application of most older files on their VO....
Now matter is to see, what they gonna do on upcoming months....
Hope is always alive....
(All is my observation.imagination)...