Account Assignment Tab on Purchase Order

Hi Gurus,

We are facing issue with Account Assignment tab on Purchase order.

We have created a PO with multiple line items (say 5 line items)  on all the line items it is displaying 1st line item accounting details. When we click on details button on any of the 5 line items and went to Account Assignment tab it is displaying 1st line item accounting details.

We are on SRM 7.01 with EHP5..