Bandwidth reading for Mac Pro

Well I'm not exactly sure if this is inherent to the Mac Pro because it has two ethernet ports but there is something strangely hokey about the bandwidth tracking according to iStat. I know for a damn fact there is no way I'm uploading that much data yet there it is.



This was taken after a few days of downloading but for instance, this morning I turned on my computer to read some news and check email without uploading anything and it's reporting I have already uploaded 145MB.

I don't think so.

 

I don't think I even have Bonjour installed. I'm only using one NIC and that's it. One thing I can think of is I was sending large files over to my AppleTV so that may be it but it stilll doesn't explain how I accrued 140MB in less than 10 minutes after a fresh boot.