Wow reading this makes me worried about attempting the DAT next year for my 1st time. Makes me realize I really do need a back up plan. I've been saying yes I'll have a back up plan because I'll graduate with a biology degree...but I don't really have a back up plan if I was being honest with myself.
Best of luck to you dent, I think you should apply to those schools next cycle with your current stats and if rejected then retake the DAT the 4th time...possibly try and find out if the RC is really all the schools were not pleased with...to not get into anywhere on all 3 attempts just because of that means to me one of 3 things:
a) You're applying to unrealistic schools
b) They really really really do value that RC more than even I would think (because let's face it, your science scores were good)
c) There is something else on your application or something about your general application they don't like. Do they get the sense you didn't really get involved with your extra curriculars, did half-ass shadowing, give a bad personal statement of why you're right for the profession (i.e do they think you're in it for a money-grab)...I don't know and I doubt it but I'm just trying to rationalize the situation.
Dang though, I need to get a real back up plan planned out though. This thread scares me considering I'm in 3rd year and my GPA is notably lower than yours right now (damn first year woes).