The Name'e for all these need to be more like:

{name=rbKey('entity.taxCategory.taxAddressLookup.shipping_billing', value='shipping,billing'}
{name=rbKey('entity.taxCategory.taxAddressLookup.billing_shipping', value='billing,shipping'}
{name=rbKey('entity.taxCategory.taxAddressLookup.shipping', value='shipping'}
{name=rbKey('entity.taxCategory.taxAddressLookup.billing', value='billing'}

And then the RB Keys should look like this:

Shipping -> Billing
Billing -> Shipping
Shipping Only
Billing Only