Payroll Items

I have payroll items setup to track individual employee advances for my employees.  The item type is set as an addition to pay.  Everything works fine and has for years.  I have a new employee and went to set up the pay item for him like the others.  However now as I cycle through the pages of the various options the page where it allows you to set the item for gross or net pay does not come up.  If i go and edit the older payroll addition items I had set up, the page for gross or net shows up.  But it won't appear for new payroll items.

Any ideas on how to set this item for net pay and not gross?  The payroll item has defaulted to gross pay, and I need it to be for net pay.

Thanks/