Long Service Leave

Hoping for some clarification on Long Service Leave payments.  I have two employees who have reached their 10 years.  I have set up in Payroll Categories but just want to check if they work a 40hr week there available hours for long service leave would be 346.67?  Most of the samples are showing a 38hr week (329.3346).  Our employees also are on a RDO system so we pay a 38hr week (they work 40 hrs) and they accrue 2 hrs towards an RDO.  When they claim LSL do they get paid 38hrs and accrue 2 hrs, and if this is the case when you pay the 2 hrs accrued do you put these hours against LSL or RDO paid? 

Thanks

Heather