Drop Ship OM to PRC : PO getting submitted for approval

Summary:

We have setup the service mapping for business requirement to capture PO price as EFF on Sales Order Line and to autocreate PR to PO (negotiatedbyPreparerFlag set to Yes) int he service mapper algorithm.

The logic is working fine and PO is getting autocreated from PR. however there are following issues:

1) PO is getting submitted for approval. We need the PO to be kept in Draft status and Buyer to review, update PO and approve. Please advise to control this via the the service mapper or otherwise through configurations.

2) PO price in Sales Order EFF can change sometimes. Does Service mapper support updates as welL?