Michael,
I am sorry you are having challenges. I can assure you with 100% confidence that with our drivers, the anti-spoofing capabilties are only enabled for SR-IOV. I have dug into the docs myself, and gone and asked the guys who write the drivers. This feature is only available under a SR-IOV environment, and we provide via iproute2 a mechanism to turn it off if needed.
To be sure you are not using SR-IOV, can you maybe to a lspci and grep for 'eth' (case insensitive) and see what is displayed.
thanx,
Patrick