Payroll Accruals are not consistent -

From the beginning of this new fiscal year, the payroll accruals have not been correct or consistent. I have not changed anything. Two employees are not accruing any entitlements, others are spasmodically receiving accruals but not correctly. 

I don't want to continue operating this way. What can I do? Do I need to make a manual adjustment to correct the accruals? How do I do that?

I contacted MYOB a week ago and still waiting for a response.