Very strange traffic graphs, viewing video on WAN2 but traffic on WAN1 (Solved)

[smicschool]

I have been using multi WAN's for a year. I recently noticed this.

When using WAN2, web browsing and downloading files are normal, but when I view videos, WAN2's traffic will appear in WAN1's graph and in the opposite direction.

In other words, when I view videos on WAN2, the traffic will appear in WAN1 as "upload" traffic (ie wrong WAN and wrong direction).

I can reproduce this consistently, both WAN2 and WAN3 does this to WAN1.

Can anyone offer possible explanations? How should I go about troubleshooting this?

I'm using pfSense 2.2.4.

Need help badly! Thank you in advance!

EDIT: Mystery solved, I'm using remote desktop via WAN1 to control two other PC's on WAN2 and WAN3 respectively. So WAN1 upload traffic is RDP data. Phew, I thought I was going nuts for a while. Thank you! >_<