The Config > Payroll > Contributions screen includes a column that lists the Processing Order for contributions. This means that if more than one contribution is assigned to a pay, they will be processed in numerical order from 1 onwards.
The contribution items in a portal can be ordered using ‘Re-order Contributions’.
Go to Config > Payroll > Contributions.
Click Re-order Contributions. If you have more than one region enabled in your portal, you will be prompted to select which region you would like to reorder in a popup window.
Click on each contribution that needs to be reordered and drag it into position. The contribution at the top of the list should be the contribution you would like to be processed first.