Split PO SRM

Hello,

We are facing the following problem:

We create in R3 two purchase requisition with more than one item.

One of the purchase requisition have an account asignment and the other one is direct.

Example:

-Purchase requisition 1 has 3 items and all with account assignment.

-Purchase requisition 2 has 3 items without account assignment.

We transfer the two purchase requisition to SRM and create a Bid Invitation.

In the bid invitation we select the two shopping cart, so we have one bid invitation with 6 items.

We create a Purchase order but unfortunately we find that 6 different PO are created (one per item).

Is the system working in the correct way?

How can this problem be solved?

Thanks and Best Regards,

Eugene