It shows the "at nvc" too. Which I'm assuming is still true since the consulat provide the interview dates to the NVC who then email us with it. I might be wrong but I believe the next status is "ready" and that's only when we have our interview letter. I read on here and reddit that they are not very good at updating the status and some people have their visa on hand and it still shows "at nvc". I wouldn't give it too much attention tbh