US Immigration from Russia

So just for context - this is not my case, but someone is a chat group that I am in, who posted:

"Anyone in the process of getting NVC approved? I'm dealing with a complete submission followed by request for resubmitted duplicate documents... I uploaded and ceac shows uploaded. I know a man who is not on this chat. He has exact same problem. Asking for already submitted documents and when he emailed a request for an update they only responded he should wait... They wanted duplicate of w2 and wife prior divorce. Also hand signed versus digital signature on the application ds260. FYI their website says to digital sign."

I have paraphrased a bit, but otherwise word-for-word what this person wrote in the chat. I've never heard of this sort of request, and I even have done an archive search of VJ and haven't found any other instances of people saying that NVC has asked for an RFE for a physical signature on the DS260. I'm wondering, did they misread something, or is it really possible that NVC wanted this somehow signed on paper? Even the PDF output of the DS260 doesn't have a place for physical signature if you wanted...

My Moscow-based girlfriend received a tourist visa and wants to visit me in the US. She must travel and get vaccinated first. What would the best place for that? Istanbul? Dubai? Israel? Ideally, we would like to find a place reasonably close to the airport where she can go, get jabbed and fly back to Moscow all in the same day. We are looking only for the Janssen/J&J vaccine since it is single dose.

Thank you in advance.

received visa and now in the US. Embassy issued cr-1 visa when they should have issued IR-1 visa. Married for more than two years when visa was issued and traveled to states.
Who do I contact to get state department/ immigration to fix this?

NVC needs a federal income tax return but I have not filed one for the last 3 years since I was living aboard with my family. What do I do?

My wife and I are planning on a Trip to England. We just got her an ADIT stamp to ensure she can get back into the US.

However, I had not considered the fact that she needs a VISA to get into England as she is not yet a permanent resident of the US.

She has a Russian passport, so somehow she needs to get a UK Visa, but that seems difficult to get as she is here in the US, not in Russia.

So what do we do? She says that we need to go to a UK embassy here in the US and apply for the Visa. Is this correct?

I have checked the UK Embassy Website, but did not find any useful information.

Greg