And remember that as far as QF is concerned (especially when it comes to the FF program and things like SC earning), WLG-CHC is not considered a domestic flight. References to domestic flights in the QF FF program are specific to Australian Domestic flights.

Any routing change requires the ticket to be re-issued and that mean recalculation of the taxes, levies, surcharges and fries (whether or not you ordered fries with it).