Two PFsense routers and static routes

1 Pfsense box with 3 links. wan ,lan .And opt1
Second Pfsense box same setup Wan ,lan opt1.
Both have their own modem and Wan IP
Both have a different lan subnet.
The pair have a static route configured between them on the OPT1 interface (separate subnet) 1/2 mile apart using wireless AP's to make the link.
This works flawless.
Both lans have several servers , mostly Security systems with cameras , so we have a lot of internal traffic.
I have Pfflowd set up sending data to my trial ManageEngine install .

I could only see traffic counting up in one direction untill I created an IP group for each lan.
My question #1 Is it possible to configure M-E to ignore the internal traffic. I only want to monitor traffic from wan/lan -lan/wan.

Also How can I set it up so I see simply the total of In and out flowing in MB or Gb together as one number? Per Lan IP Again ignoring the traffic fron Lan through the OPT1 internal interface.

Thanks
Allan