Payslips for casual employees

[twr7cx]

I've noticed there's a fair bit of discussion about businesses and employees rights and such, so I was curious if anyone knows the answer to this question.

Does anyone know if there are any requirements regarding pay slips and casual employees - i.e. does the pay slip need to state when the employee works? Or should there be a roster signed by the casual employee to ensure all hours are being payed for?

Basically, my employers system is designed for ythe full time employees. It's a weird setup that even the manager doesn't seem to fully udnerstand, but from what I can gather it pays fornightly and pays for 1 week in advance, and 1 week behind (the pay slip is actually dated for a week in the future).
Now obviously for a casual employee your not going to pay for a week in advance incase they don't show - so they must be doing something different. But if I work, I usually don't get payed for that for quiet some time and with the odd future dates on the payslip it becomes impossible to work out when I'm being payed for - in other words I really can't tell if I'm not being payed for certain hours or days.

My sisters work they log there hours into the computer at the end of each shift, then the pay slips state whats been payed for. Is this just good practice by the business or is there a requirement to do this that mine isn't complying with?