I'm surprised as well. especially as you mentioned February was when you got the reply. but in fairness they did tell you that they are not in a position to interview yet. Anything can happen in a week and maybe a decision was made.
Your name is on the records though so hopefully when things are stable, you would get notified if you are still required for an interview.
I know how gutting it must be to hear but its pretty much happening everywhere.
I don't really want to get into my opinions as to why they are still advertising (are they?) for new FAs. I'll leave that to the speculators. Usually, someone mentions that having fresh starting pay people around the corner means more experienced and higher paid staff need to look over their shoulder. But I'm not saying that at all.