Workload Balancer to Exclude Weekends

In some instances, work from a timeline task on a project with a default schedule set to exclude weekends shows up in WLB with time assigned to over the weekend.  This causes a discrepancy between the project schedule and the WLB resourcing.  I understand that for some reason this is intentionally set up this way, but there should then at least be a setting in the WLB to exclude scheduling work over the weekend.