Do you have wifi? Amazon will be charging you for transferring documents using Whispernet (3G) with the
myname@kindle.com email address. If you use the
myname@free.kindle.com address instead then it's free and the documents can be downloaded to your Kindle with wifi.
I've seen some posts by Kovid about the naming convention for news downloads, I think if you sideload the news via a cable then the date will show up.