The payroll costing allocation categories "Worker Position" and "Worker Position Earning" are very different and not interchangeable. In general, "Worker Position" is the category most of us will use most often. "Worker Position" represents the standard pay, benefits, etc. that are applied to most regular positions.
Assigning a "Worker Position Earning" costing allocation should only be done for pay categories that will be accounted for on a different worktag string than their "Worker Position" costing allocation (such as Short-Term Disability, Long-Term Disability, Retention Bonuses, etc.). If the accounting falls on the same worktag string as was set up on the "Worker Position" costing allocation, there is no need to add it into a "Working Position Earning" costing allocation.
See this Quick Reference Guide for more details
Questions? Please let the Payroll Team know via askfinance@virginia.edu