I am pretty sure. In any event if I was attempting to load a second joystick test Arduino rejects it. I will delete all the sketch library and start again. Having said that I did read on a forum but new versions of Arduino are not always backwards compatible. I have the latest version.
Like you are don't understand why it's rejected. Perhaps you could give me the specific code that will allow the Leonardo to interface with the Joystick.
As I think I said it shows up in control panel then in Windows test program but the encoder has no effect.