Something wierd with mac address' that I cant explain on my i2600 Series F5 LTM HA

We have 2 F5 LTM i2600 series physical devices running v13.1.3.2. We have 4 X 1G interfaces and 2 X 10GBFiber interfaces. One of the 1GB interfaces is patched and is used for the Management IP. Both ...