No overall change to operating cash flows, but what concerns me...

No overall change to operating cash flows, but what concerns me is the fact that revenues from customers are reduced every period of the 6 periods reported:
30/6/12 $202m to $199m,
31/12/12 $168m to $153m,
30/6/12 $324m to $288m,
31/12/13 $199m to $172m,
30/6/14 $442m to $410m, and
31/12/14 $261m to $239m.
These are CASH received figures (not due or payable, but RECEIVED), not accruals, not estimates not journal entries, they should be based on cash in the bank - was the cash in the bank or not? - it now appears not! .... that's what worries the market I think, and I suggest rightly so!