Yeah, NA happens the same time that the officer checked your ADR and made decision based on that (which is usually sending the case to SS). You are also in SS and I agree with you, don't expect anything for the next 4- 5 months. But don't worry about it, time flies quickly and you will get itYup! Hope it doesn't take years for them to analyze these ADRs.
Well, I didn't notice any ghost update (status change to updated) but the status of ADR was changed to NA within one day or two after the last submission. If that's the starting point, I probably won't hear from them till Feb/March 2020.