IP Groups have double the site-to-site traffic

For our MPLS network, I have created a few IP groups to help identify traffic flows going from our head end MPLS router to specific sites. The traffic displayed at a devices view (say the router) shows correct, however the IP groups seem to show double the traffic (exactly). I have verified that ip ingress is configured correctly on the end devices (as stated above, my devices show the right bandwidth). So basically, if I create an IP Group from Site A to Site B, it may show that a 1000kbps peak, but when I check the outgoing Site B router (at the device level), it shows only a 500kbps peak. Can anyone think of what I could have misconfigured?

Thanks in advance,

Matt