[CentOS-virt] Kvm intel dual gigabit ethernet nic pass thru.

Hello I am having a weird issue with a PCI-X Intel dual gigabit ethernet nic. While I am partially successful in pass thru with kvm, I have a weird issue with my pfsense freebsd vm. It see the two nics but gives them the same Mac address. I'm not sure if this is a pfsense bug or what. The nic works for everything but this Mac address issue.

Long story short, I guess what I'm asking is there any options I should use when passing thru dual and quad Intel ethernet adapter right now I am using

hostpci0: 1:00.0, driver=vfio

Thanks Rafeal