If you have an FTP blog, you will still need to republish your blog in order to reflect updates. To republish your blog, go to
Posting | Status:
Republish Index will only republish your blog's index (home) page, and your Atom feed, if you have one:
Republish Entire Site will do exactly that- republish all your blog's pages, including the index page, archive pages and post pages:

A status indicator will show how much of your blog has been published :