Hi,
if I select a copy of a rectangular light with the name “test” and press the make unique button, than the light “test” stay selected and the user may think, this are the properties of the current selected light. But it’s a pitfall. Deselecting and selecting again shows the right selected light options of “test#1”.
-Micha
This only applies to the Asset Editor selection.
The Rhino panel shows you the correct parameters.
I think we can just auto-select the light in the Asset Editor when the make unique button is pressed.
A fix would be very welcome. 
Maybe the same issue seen at the latest nightly - if I copy and paste an area light, than the pasted light is selected at the viewport, but not at the Asset editor. So, I adjusted the wrong light parameters a few times.