Assigning buttons to scripter script

Hello Mainstage pro's!

I hope you can help me out here. When I assign buttons to my scripter script, the buttons light up by all values, not just the selected one.

For example: when I have a pluginparameter menu with values "low", "medium" and "high" and assign 1 button to medium and 1 button to high in the workspace, the "medium" button lights also up when I click the "high" button. The same behaviour happens when I click the "high" button.

Ive tried fiddling with the scale parameter values but nothing is changing. Am I missing something here? Thank you very much!!