Joy sometimes changes linux controller mapping

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Hi everyone,

When launching joy I occasionally experience a case where I have a wired xbox360 controller plugged to the machine and joy instead uses wireless mapping? This is obviously an issue for when I am operating my robot as the left trigger for wired mapping is Left/Right Axis stick right for wireless mapping. Can anyone point me to if there is an option to force joy to use a wired mapping or perhaps if it is xboxdrv that is presenting the issue?

Thanks in advance for all help.

EDIT in response to gvdhoorns comment: The Joy package maps the arrays of axes and buttons differently depending on whether the controller is wired or wireless. My problem is that the controller is always wired but occasionally will map to wireless.