My adsl usage graph is about as effective as telkom. Your best I had no usage for 4 days in a row and then suddenly used 450 odd megs in 1 day. They still count it up. those graphs are crap. Download this app, very cool and best way to monitor your usage. http://www.bandwidthmonitorpro.com/download.htm . shows uploads, downloads everything, just can't use it if u on a network as it monitors all traffic from your IP.
There is no peace without war!!!