Scroll Wheel and Controller Axis Conflict

[Jrix]

It appears the "Device" I have selected at the top left dictates which buttons I'm allowed to use.

If I have keyboard selected, I can use my mousehweel but then I can't use the controller.

If I have the controller selected I can't use the mousehweel but the controller works fine.

Is there an obvious solution?

[Billiard26]

Right click the button for whichever input you are trying to map.
A new window will appear.
Manually select the device on top, and the input in the list.
Click the "Select" button.