We are using QuickBooks Enterprise Solutions:  Manufacturing and Wholesale 23.0.  We have serial numbers turned on and sometimes they work correctly.  Other times, I end up with both positive and a negative quantity on hand for each serial number I use.  None of this relates to the quantity of the item on hand, and happens when both a negative and positive number are in the same inventory location.  I don't even undersand how that's possible.  And I can't figure out why this is happening, or how to fix it.  (I've tried adjusting the work orders, adjusting inventory, adjusting inventory - but only the serial number.)  Nothing seems to work, other than removing the serial numbers from both the creation work order, as well as the consuming work order.  This is not what we're after. 

Anyone have any experience with this, or understand why it's happening?  It's been going on for years, since serial number capability came along.  

I've included a screenshot showing what it looks like when the serial number issuing doesn't work correctly.