For bandwidth measurements, I've used the LW graphs and the OS X Activity Monitor.

Still, looks like you've a lot more traffic than expected. LW also compresses traffic for a big savings, so if your meter measures traffic before it's compressed, that mmight account for the difference (though I doubt it). Any way to see where that traffic is coming from (Internet Explorer would be the first application to check)? Hope your machine isn't being used as a remailer or whatever is meant by Windows machines being maliciously hijacked. http://it.slashdot.org/article.pl?sid=04/11/30/1932245

re the .25/25--just change your upload setting to 50% or 10%, and see what number the .props file displays after a bit.