Axiom 9 Displays EV-1 Magnetic Heading Incorrectly?

[Dan_Y]

I have an Axiom 9 networked to an EV-1/ACU-100 Wheel Pilot via a STng network. The EV-1 is the only source of heading info and the Axiom is the only source of GPS info. EV-1 compass linearization was performed successfully (4 degrees of deviation – the iNstall you recommended from Gemeco worked great to drive the deviation down), and I have good agreement between the ship’s compass and the EV-1 magnetic bearing displayed on the p70s (within a degree) and so did not perform an "Align Compass GPS". Axiom has v3.1.96, EV-1 v1.11, ACU-100 v1.12 and p70s v3.06.

When in True bearing mode, the EV-1 “value in use” from the Data Sources menu on the Axiom and the p70s agree exactly. When Magnetic bearing mode is then selected at the Axiom, the magnetic heading displayed on the p70s and the ship’s compass agree to within a degree, but the Axiom incorrectly displays the magnetic heading. The Axiom appears to be consistently doubling the local magnetic variation then adding that value to the true heading value. I have not noticed any additional “crab angle” of the ships icon when in “heading” mode but not sure if I could anyway as 10 deg is a small angle and haven't looked for it). Screen captures in PDF attached.
Thanks
Dan_Y