Non-sales order Business Units are showing up in Sales order creation page

Hi Team,

We have few business units, which we are not using for the sales order creation. We didn't provide data access for these BU's for the roles Order manager or Order Entry Specialist. However other non-sales order Business Units also appearing on the BU LOV field on the sales order creation page. This LOV list contains PCBU's also. For these PCBU's we have disables 'Sales' check box under Assign Business Unit task of Business Unit Setups. Still these PCBU's are appearing in the LOV list.