Changing your hotkeys will leave both the old and the new one active. This can be done many times in a row, resulting in multiple combinations triggering the same hotkey.
How to reproduce:
Launch the Script, change your hotkey for either script function and press "Update". Both the new and old hotkey will now be active.
How to temp fix:
Manually reload the AHK script after pressing "Update". This will leave only the newest hotkey active.