Just had second INFOPASS in LA county office. I basically asked what
@Britsimon listed earlier (If someone go to INFOPASS you should check his post, it's so helpful), then officer told us everything is done. File is here (which I called KCC yesterday and confirmed they said LA county office requested in November however officer said JUST got it), Back ground check is also done. So we just have to WAIT for the interview. He said there's no available date for interview right now, so just wait. Then I asked "How long do you think it will take?" He answered it should be less than two months. Hopefully...
By the way when I showed policy memo which Britsimon put the link on earlier post, he went somewhere to ask some questions. But after that he came back and said "This memo is about when you can submit your document, you still have to wait like other people do." Looks like LA county office doesn't have that much experience with GC based on DV.
When we went to first INFOPASS, another officer showed me USCIS processing time information which you can check in this link.
https://egov.uscis.gov/cris/processTimesDisplayInit.do
Today when I asked him whether our DV case is also categorized this, he answered YES. So according to that page we have to wait another a couple of months or so.
So... Only thing I can do is just WAIT... Sigh...