having chewed through the latest numbers(half yearly) could...

having chewed through the latest numbers(half yearly) could someone please explain to me why the costs to transport and treat the waste has risen.
STP have a refurbished incinerator in melbourne so they now dont have to truck the waste to sydney(cost saving) as they have had to do in the past.The price of fuel has come down(cheaper running costs)
The operational side of the company has been overhauled and yet the transport costs have increased.
Its been six months since all these changes have been in place and they should have resulted in lower transport costs.
Yes Ive rung the company seeking answers and they are yet to return my calls.
BRING ON THE COURT CASE..........