Eric,
I don't know what 'Real' safety stock means. Do you have ....'Unreal' safety stock as well?
You mention '......10 should get confirm....'. Are you talking about Availability checking (ATP)? ATP is generally unrelated to configuration of MRP Types.
You can set up ATP to 'assume' that safety stock quantities in the material master are not available for confirming sales documents. OVZ9.
Best Regards,
DB49