You know what? I've been calling the schools and most don't seem to care if you take it a third time. Just call around to the schools you're interested in and make sure they aren't averaging the scores by the time you take it a third time, you know? No need to waste money that way.
I've heard lots of success stories regarding pple who took their mcat 3x. If anyone asks you why you took it 3 times, just be prepared to answer the question. But I dont think many schools will ask. Maybe 1 out of the 15 or so you apply to anyway.
And as long as you're showing improvement. Some schools will take the highest score out of each section. Some schools will take the highest overall score. Some actually take the most recent score, so you are hurt if your score drops. Most of the schools I called take the most recent score, but just call the ones you're interested in and see what they say.