PST NOT CALCULATING ON INVOICE

Summary:

We have an invoice where PST is not calculating on a BC invoice. The Bill To is in Alberta, but the Ship is BC.

Content (required):

We have an invoice where PST is not calculating on a BC invoice. The Bill To is in Alberta, but the Ship To is BC. The tax setups say to calculate tax on the ship to and it is working correctly for other customers which show a Bill to in a different province, but not for this BC customer. I see another question on the same issue, but the solution for that question is already in place in our case. Would anyone have any ideas on how to fix this.