Turned on the lights via the add-on 3-way switch (that doesn't trigger a NIF), Z-Way status "Off" (duh...)
Waited for ~1min for the poller to fire off. When it did, Z-Way debug reported the dimmer percentage levels slowly drop. Basically, when the poller fires off it flips the state of the lights... If I turned the lights on via the add-on switch, Z-Way shuts them off. If I turned the lights off via the add-on switch, Z-Way turns them on.
PS, I haven't been drinking but wish I were... might explain the above
