Issue with offer approval and discount update

After an offer is created with a discount table and approved to be in Planned status. When the offer is sent for approval from Planned to Active status, it complained of duplicate discount line (due to All item line conflict with another line with specific product code). However no change is allowed on the discount table - the edit button is greyed out. So three questions ;

1) How do we skip the approval for offer so every new creation saved as Active?

2) How do we skip the Planned status approval? Now it's from Draft > Planned > Active.

3) How can we update the discount table after the offer is beyond the draft status?