NIC Missing

[DeathMagnetic]

I've reinstalled MCE (4th time maybe) and I'm having a bit of trouble with the NIC all of a sudden. he webadmin page only shows 1 NIC available, but I'm still able to use the internet through eth1 on the core. The media directors can't find them, and the webadmin page shows my external NI as being {extif}.

Should I wipe the /etc/network/interfaces file?

EDIT: MCE changed the interfaces file to use {extif} instead of eth1, I rewrote the file but if I choose to udpate from the webadmin page or restart the computer then it'll reset to {extif}.