Security Level Help

Hi,

encounter problem to filter the PO line with financial dimension: profit center & inventory dimension of warehouse.

example Security level: Po line dimension ='Marketing". Inventory dimension: Warehouse: WHS01

But, when user login PO, he able read PO header with blank line with wareouse: WHH01, (other then WHS01) & profit center (other then marketing).

Any idea, what is missing to include in security level? (we dont want filter by PO header)

Regards