Specific Joystick Button Malfunctioning (joystick button 5)

All buttons for joysticks seem to follow a simple convention, [joystick button 5] for all joysticks, and, [joystick 1 button 5] for joystick one, and [joystick 2 button 5] for joystick 2. Seems simple, however, no matter what joystick I tell button 5 to receive input from, it receives input from all controllers. Unity is built pretty well, and having never encountered a mechanical bug stemming from the Unity engine itself, I would be surprised if this issue was not generated by some error on my part. Regardless, this issue needs to be solved by Monday, so please help if you can.

As always, it was user error. Completely in code and unrelated to the Input Manager.