It sounds like you’ve added both the light and the button to the devices in the scene, but only the light should be added.
Scenes set controllable devices to specific states and a button is generally not a controllable device (it’s the device that does the controlling). Scenes are also not directly activated and need an automation to activate them.
You’d need to create an automation and specify that ‘when’ the button is pressed, ‘then do’ activate the scene.
Happy tinkering!
Glad I could help!