My guess is just a branch specific / rep issue. They're human beings and some are there to help you out, while others would probably scrutinize as much as they can, just because.

I opened a Chase checking couple of months ago to have as a secondary, all they wanted was my DL, and existing Chase credit card which I had, I didn't fill out anything or get asked on citizenship status, the banker had me sign couple of places and took care of it.