When you're setting up the "transform" for the wideband there is a "parameter" option where you select whether it's a PLX in lambda, PLX in AFR, AEM model blah blah blah, etc. Basically that is what tells it that that input is a wideband.
The issue when you have two widebands is when using the default "AFR error" or "EQ Error" parameters it will use an averaged reading of the two widebands. It doesn't give you the option to use one or the other
I think you can make new math parameters for AFR error for each wideband if you want to get readings for each WB
I've never worked with two widebands personally so hopefully someone else can chime in that has some experience with it.