so you can connect dual -334 wideband controllers to the CAN bus and be able to log both widebands from EFILive;
Yes. That extra bit of functionality is responsible for the delay in getting EFILive support up and running. The dual-wideband code came right at the end of the qualification of the original 30-0334 package. It didn't make a lot of sense to release the single-only version, then, the dual-capable version.

It's confusing enough, as-is