That's is one of the original ZEN switches with the 20.x firmware. It is not upgradeable as far as I know. Looks like the device is possibly sending two events over for each action which is causing it to be logged twice. Some drivers will have an option to ignore duplicated events (or do it by default).
You can try out my drivers for the ZEN switches, which will suppress duplicated events like that. It is made for newer firmware which support many more parameters, but I did attempt to add a feature to hide all the invalid parameters when using older devices.
