I don't know. That is for you to find out the day of the interview.
The topic for your short essay portion will probably be different from the previous interviews.
I haven't. I don't think anyone from the 1/26 interview has been removed from the wait list. The AdCom will probably remove those who interviewed from the earlier dates first.
If I remembered correctly, there were about ~70 interviewees at the 1/26 interview. What do you mean by "how many altogether..."? Do you mean how many people are they going to interview in total? According to PharmCas' school info, last year the school interviewed ~450 people. I would think this year the school will interview around 450 people.
...and apprx 70 people interviewed in September.....we were the first candidates to be interviewed.....what also has to be put into consideration are the candidates that are not on this forum, because there is quite a few......