US Immigration from Syria

We were finally approved after 14 months. We are now at NVC. I just looked at the spelling of my husbands last name and it was not corrected. I sent in a letter to USCIS months ago to correct it with just an extra letter so it will match his passport. It is a very minor spelling error. USCIS never corrected it. We are at NVC now and I'm wondering what we need to do. I sent a message to NVC and have not received a response.

We are still waiting for NOA2. It s been 11 months now. I called a few weeks ago and security checks were done all the way back in July so it s just frustrating that it s taking so long. Any idea idea what could be going on?

Usually when I login to the USCIS dashboard it will shows a date viewed. For example September 10th was the last time it was updated. Now today I noticed it says current as of today and then the exact time. Does anyone know if this is a new thing or what this is? At first I thought they were actively working on my application but then I noticed it was still updating the time well into the evening. Any ideas?

I was just wondering at what stage (if any) of the process are RFEs sent? For example are they just sent out towards the end of NOA1 stage or there is no specific timing just whenever the officer is working on your case? Just something I have wondered.