Differences between "Somebody has done something" and "Somebody has been doing something" ??

What is the difference between Proportionally and proportionately ?

Could you indicate which one is the subject or object in the sentence after comma? The working-class child from a less-prestigious college is not likely to wind up impoverished, but neither is he or she likely to attend many parties of Yale or Vassar alumni. (I read this sentence in an article. i couldn't understand what it means... i thought that it could be a wrong sentence. why is "he or she" not "him or her" ? or is it used as subject of sentence? is it an example of special usage of neither?)

Do both of two sentences have the same meaning? the election was so bitterly contested that a special electoral commission was given the authority to determine which candidate had won. the election was so bitterly contested that a special electoral commission was given the authority to determine the candidate who had won.