You should be able to identify a 'primary' role within the multi role feature so that when you move to the Pay Options screen the data that auto populates is that of the primary role. Currently, the auto populated data is just the first role in the drop down list (even if this role has an end date).
We have staff that have been promoted to a new role but when we go to Pay Options the data that appears initially is that of their old role and we have to navigate down the list to the new role causing confusion. It would be much easier if we could determine which role is at the top of the drop down list.