I am in a confusing situation regarding my mother's B2 visa Admin process that I would appreciate anyone's advice on this.
I'm a PhD student in the US. Because of the heavy load of research I have to do all year round, my mother visited me every year for about 1 month during the summer. It has been going on for 5 years. For the last 4 years, she just mailed in her B2 visa application and got stamped within 4-5 business days, no problem. This year, she mailed it in as usual and got a letter saying she needed to attend an interview before the decision can be made and that her application falls under 221(g). Now, the only thing that's changed in this application compared to last years is that my cousin filled this one for her (my mother doesn't speak English) and my cousin filled in her wrong place of birth (different from her place of birth in previous years applications). She plans to go on the interview next week and I'm worried as what the reason for this call for interview might be. I'm not sure if its just the place of birth or something else. My mother has ties in my home country (including my sister still living and working there, my grandparents and her house). She never overstayed and had no problem renewing B2 visa before.
Do you have any advice for me? Is 221(g) already a refusal and the interview is just for completeness? I'm not sure what to do to prepare her in this situation. Thank you.