Depot Repair Service Types will not allow me to setup 2 different Billing Types for same Service Act

I am setting up Depot Repair, specifically creating 2 new Service Types to use on the estimate/actual charge area of Depot Repair.

I created 2 new service activities:

   Billable (TC)

   No Charge (TC)

and 1 billing type:

   Expense (TC)

Both have appropriate order types tied to them and both are checked as Depot Repair types.

When I go to utilize them on the Depot Repair, Service Type setup form....It only lets me pick the first one I choose, its acting like it can't have 2 different service activities that use the same billing type.

This seems like a bug, because items can only have one billing type assigned to them on the service tab of the item part master/organization items form.....So you would create 2 different service activities that use different order types or in my case, 1 to charge the customer full price, and 1 to give them the depot repair service for no charge.