Annoying? Not really, it's good that you're testing things out and letting me know what's wrong since I messed with a lot of things for v1.0.3, so things are bound to not work as previously. I also noticed that the External Bus doesn't 100% work properly with fluids as it caps at 100 units.
As for the Item Bus, the logic I have at the moment is atrocious since I have lots of filters and blacklist/whitelist checks to do but I know that it does work if both are set to blacklist. I'm working on the filters for the drives right now and I don't like the current filter logic on the External Bus, so I'm going to rework that along with revising the logic for the Item Bus.
Yeah, it's going to take me a few days to get all of this done plus I have some college exams to prepare for, so this update probably is going to come out later next week hopefully.