which driver mode are you using? if using ASIO it will only show, for example:
Guitar Rig 1 L
Guitar Rig 1 R
Guitar Rig 1 Stereo
the "L" is the left input, the "R" is the right input and of course "stereo" is both of them for a stereo track.
if that's not what you're seeing, which driver mode are you using? have you tried any other driver mode? some companies don't write drivers for WDM any more or they don't support them any more and that could cause problems.