I see you just joined VJ today.... Did you ask to speak to a supervisor or "Tier 2" as they are called at USCIS? If you were only speaking to the first person that came on the phone at USCIS, they don't have access to as much as the Tier 2 person does. I highly recommend calling USCIS back and ask for a Tier 2, and calling NVC back and asking for a supervisor. You may need to call several times and see what answers you get. Often you will get a different answer from each person with whom you speak. Best of luck!
p.s. Try the advanced search tool in the upper right, if you haven't done so already.... I really hope it's just some kind of error that can be fixed. I haven't seen something quite like this.
