red interface changing eth

[Guest]

[dollabillz217]

I'm running EFW 2.2 RC2 and everything on it runs just fine.  I have two Nics on my firewalls, one onboard and one add on NIC.  The onboard is always eth0 and normally the add on NIC is eth1.  Well on some of the firewalls the red interface just randomly changes from eth1 to another eth (eth05, or eth11 for instance).  When this happens my network goes offline and the only way to get it to come back  is to connect to the web interface of the firewall locally and go through the network configuration wizard and tell it what the red interfaces new eth # is.  Does anyone have any clue what could be causing this?