Pay Slip Still Shows All Associated Wage Categories Even When Balance Is Zero

We have various locations and each location has multiple shifts at different pay rates, with the staff being both casual and part-time. As a result we have a large number of Wage Categories.

When an employee moves location, or converts from casual to part-time, we're not able to deselect the wage categories from their previous location. In one case, an employee has over 20 wage categories listed on her pay slip, but only seven of the categories have a balance for that pay period, the rest are all zero hours/$0 (see attached).

I understand the logic behind being unable to deselect the pay category from the employee card, as it's "been used in a previous timesheet". However, is there a way to set up the pay slips so that they only show wage categories with a balance above zero for that pay period?

Thanks