Any reason why you’re using raw image over something like resizable? Is there something special about the partitions or disk layout?

It also wouldn’t hurt to update FOG to the latest 🙂

The way both iPXE and FOS work is it will stop searching when it finds an ‘up’ interface. So if you want it to pxe boot place the pxe boot network in the first interface position and then use the second or what ever else for the network where you have no control.