Infinite Scheduling - Resource Question

I am wondering if it is possible to do infinite scheduling and choose the resources that do not have anything scheduled on them. Currently, the schedule results in all the operations going on the first resource in the group.

However, all the resources in the resource group are the exact same. Additionally, under job entry > operations, we specify that the operations should choose from the resource group. Why will it not spread out the scheduling?

Any help would be appreciated!