@antrock85 The FW2B got two physical interfaces. Installing pfSense, one will be assigned as the WAN and the other as the LAN interfaces. That's all the pyhsical interfaces assigned.
Now you can create a VLAN (Interfaces > Assignments) to have 'more' interfaces, which will show up as OPT, OPT1 and so on.
But to use it/them you have to know how to work with VLANs.