Negative scrap transaction not removing qty from quarantine location

Afternoon everyone, 

I’ve run into an interesting scenario where a manufacturer will use the quarantine scrap action if there is any question the item may be damaged, then a QA process occurs and sometimes the item is deemed to be fine and can be moved back into finished goods. 

The easy solution was to do an inventory transfer out of the quarantine scrap location into the finished goods location which works, but the client needs the qty scrapped value on the production order to update:

So I started trying to do negative amounts on the scrap line of the move transaction:

This seems to work from a financials standpoint (clears out the scrap expense entry) but it does not effect the inventory qty located in my default scrap location. 

All material is being backflushed in this scenario. 

Any help appreciated,