Experiencing that the controller was not seemingly getting data reliably from some nodes, I tried to up the GW power from LOW to HIGH. I reflashed the GW last night and set it all back up.
This morning I find the spikes and ghost nodes are all back, along with long periods where node data is not presented on the dashboard.
I have now cleared the GW eeprom and reflashed again with LOW power, just to see what happens. I have rechecked all connections and will see how it goes.
If the issues continue I will re-enable all those DEBUG's and let you know.