The gubmint has proven many times they have no cyber security. Looks like they did it again.
Apparently lack of communication runs strong, too, since she couldn't tell you why you were flagged. I'd call back - and keep calling back - to get them to find out so if you do need something in hand at your appointment, you'll know what is needed.
But then I can be a real beyotch when it comes to things like this and will hound them until I get results. LOL!
I wish you lots of luck with this mess.
I will start calling tomorrow....the problem is having to hold forever for someone to come on, and I have to do it at work. But I will start.