Why is it that now we can only rate one answer per thread helpful.
The idea is...you're rating the best answer that was most helpful for the person :) out of all the ones that have been posted.
I usually wait like 3 days and then go back and rate the first 3 that I though were the most helpful.
what if... I were to rate an answer helpful, but then later a better answer was added.
but I developed the habbit of rating every answer that sticks out at all to me.