Cynthia,
RW is a web publishing tool that is designed to allow you to compose and build pages on your computer then publish them to a server.
If you ‘edit’ a page outside RW - in TextWrangler, for instance - as I think you did (?) there is no way for the corresponding page on the server to reflect those changes other than by reinserting the text, once changed, back into RW. In large part such a procedure defeats the purpose of a web publishing tool.
Or have I completely misunderstood what you want to do?
You might consider such Content Management Systems as Total CMS or Armadillo for what I think you may want. Good luck!