I'm a current PHAP and will let you know how it happened last year...Good questions! I'm wondering this as well! I didn't receive anything yet.
In reference to the questions about hearing if you don't make, that is a no. You will simply cease to get any information, that includes after the personal statement and interview.
As for another round of emails about going on to 2nd phase, I believe that it happened that way last year. Also people may find out about moving on to interviews at different times as well, and for final selection that went out in waves all the way through August.