If you didn't get invited for the second set of tests, you weren't considered. You'll get your PFO in a few days/weeks.
That's how it went last year at least. I imagine they have a delay to keep their options open? I doubt they need to, with 3500 applications.
Wrong and wrong, if you didn't receive yet your TFO is because they still looking, so yes we stay opting for those positions, and applicants is half of the figure you mention as far as I'm aware from good source. So guys keep positivie and your fingers crossed!