That doesn’t appear to be a grounds for denial. Consult with an attorney for guidance.

There is confusion in nature of question. Consult with an attorney to discuss your case further.

It is better to wait until specifically requested by NVC.

Yes that is normal given current processing times.

You should have decision within 120 days of interview.

You need a consultation and full review of your immigration history. Consult with an attorney for guidance.

Yes you may apply for the N600 at this time.

It is likely in error so I would not be concerned.

Yes you may request another rescheduling.

Contact the Embassy to discuss your case and inquire about next steps.