I wonder if this is still an issue for you?
The same happened to me, too. My T330 has an iDRAC enterprise card, that is recognized as another network card. So unraid made this eth0 and the real network cards became eth1 and eth2. I simply changed the interface rules in Network Settings to make the iDRAC port (shown as USB network device) eth2 and the other two shifted to the first two places.
After a reboot unraid behaved as expected.
@TermyD I'm well aware of that solution. I commented even on the discussion there. However, autofan only monitors disk temperatures, not the CPU and that's unfortunate. Standard without autofan is roughly 4200 rpm. I'm not saying the device is making much noise, but it is audible...