If it's an import it's probably had the inner 2 bulbs disconnected from the brake circuit so that they can be used as rear fog lights.

When I bought mine it had been wired up so that the outer 2 bulbs operated as brake and normal rear lights, and the inner 2 operated as fogs

- the inner 2 only have single fillament bulb holders so they can't be used as dual function unless you replace the bulb holders.
