Missing line items after clicking on EDIT button while creating the shopping carts

Hi Experts,

I am creating Shopping cart. I am at second Roadmap element 'SHOPPING CART'. I am adding line items to Shopping cart.Added 2 lines to Shopping cart then Saved.

Then clicked on EDIT button and then added another 2 line items and clicked on Save button.For adding another line items, clicked on EDIT button

and noticed that only 2 line items are displayed instead of 4. But all line items are saved in the database. But showing only 2 line items on the same SRM Screen.

I have checked the Webdynpro Component for this EDIT button. The component name is FPM_GAF_COMPONENT. There is no custom logic for this EDIT button.

Why some items are not showing on SRM Screen after cliking on EDIT button. Is this a standard functionality.?

For dispaying all line items, what I need to do..?

Please help me. Thanks in Advance.

Regards

Nagireddy Alavala