Network monitor shows wrong number of bytes sent

Hi,

I've put network monitor in my TLB, have only one connection. The number of bytes received is growing over the day, but the bytes sent is really low (currently 17.32M). I've copied a dir of 14,4M twice to the network, but the number of bytes sent is still the same. How come? I'm using the skin Blue, number of rows = 1, selected are "Bytes sent" and "Bytes received". Sending "Bytes received" to top doesn't change a thing ???