You already have two interviews -- you're doing outstanding!! There are many many many applicants who haven't had that kind of success yet this cycle, so you're far ahead of the pack!
It's hard for me, as a current applicant, to say much more than that though. Your app looks pretty good to me, and it seems like the schools that you picked fit well with your mission. Your stats are certainly solid (better MCAT than me!). But I'm not an expert about what schools are looking for -- not by any stretch of the imagination. I think that you'll going to find a school that fits perfectly in with your service interests and be really happy there, but I have no idea how to predict the amount of interviews or acceptances you can expect. This cycle has been completely surprising to me so far, so I'm done trying to figure out what'll happen next. Personally though, I think you're in a great place already and shouldn't be worried right now at all.