Hey, I don't attend this school but I did apply and am familiar with the process and requirements.
1) Howard only looks at your prerequisites. Nothing more. They take your highest grades. So let's say you got a D in microbiology and retook it and got an A. They'll take the A and disregard the D completely. No averaging.
2) Anything over 50 composite is considered competitive. However, there are students that score well over that score. Something to keep in mind.
3) 2.7 prerequisite GPA? If so, that's above the requirement but below the average of the applicants. I believe that's a 3.3.
4) Yes, any pharmacy experience is a huge plus and separates you from other applicants. But grades matter too. Someone with no experience and a 4.0 trumps someone with lots of experience and a 2.5.
5) Sorry to hear that. Make sure to mention that in your personal statement and special circumstances.
6) Howard has a rolling admission so the earlier you apply, the greater your chances.
Good luck! Based on your stats you've got a good shot. Bust out a couple of A's in your prerequisites to boost your GPA and you should be good to go.