I agree that using DW as an FTP client is not the best way, if you are not careful, it keeps uploading all the page assest (images etc) everytime you click on the send arrow.
I personnally use FTPVoyager - an award winning client that is so easy, evan a monkey could do it. Get a free trail version here:
www.ftpvoyager.com/dn.asp
PS - I can provide a license for this at discounted prices..