Question about MQTT Log lines

This is interesting. I have another question on the forum regarding my config nodes (Question about MQTT config nodes), which may be the problem.

My MQTT broker is on a separate Pi, but according to the config tab, I have the broker defined multiple times. And I don't know why. Could this be causing the problem? (My client ID is always blank, but that's no guarantee that multiple config nodes could not auto-create the same client ID).