One of the reasons that the contribution due appears doubled is that pay to fund was not done for the previous month.
Pay to Fund hasn't been ticked
If you haven't ticked Pay to Fund for the current month, check if superannuation was processed for the previous month.
Go to Payroll, Maintenance, Transactions, End of Period, Superannuation Processing.
Ensure that Pay to Fund is unticked.
Select the Process To date for the previous month.
Preview the Report.
If the Contribution Due column appears as 0.00 the Pay to Fund field was selected, and the Contributions for this Period have been cleared.
If there are values appearing, pay to fund for that month has not been done. Review the values and confirm that all amounts have been provided to the Clearing House. If they have been supplied, then:
Take backup.
In Superannuation Processing, select the Process To date for the previous month, tick Pay to Fund, and click Preview. The previous month will then be cleared.
Close the report.
Next, change the Process To date to the month you are running the super process for, untick Pay to Fund, and click Preview to view the current month's values.
Pay to Fund has been ticked
If you have already ticked Pay to Fund for the current month, check if the Superannuation was processed for the previous month.
Go to Payroll, Enquiries, Employee Enquiries.
Enter an Employee that was paid in both months in From Employee, and tick Single Employee.
Select a date range that will pick up pays for both months and click View.
Arrange your grid to see Description, Period End, and Super Processed Date.
If you don't have these headings, right-click and select Customize Grid Columns. Drag the fields into column headings.
Filter Description to see the employer super contribution. Review the Super Process Date field. If the same date appears for both months, then both months were processed together.
You will need to go back and finalise the previous month before performing Pay to Fund for the current month, as per the above steps.