I see the issue. The key values used to be tied to variables (and their ids) when the plugin was first created. They aren't anymore.
As stated each key must be unique, you can't use 78 more than once. There is no reason to not start with 1, 2, etc.
For the value, you need to put in the word switch, dimmer, etc. This will create a node in the eisy labeled 1 (maybe with a nxxx_ prefix, I don't remember). You can then rename it (on eisy) whatever you want.