I appreciate your engagement, but you aren't sending me anything new.  I've been using serial numbers in QB for years, and have turned them on as advised in the lovely article links provided.  Sometimes they go in and out of inventory correctly, many times the do not.  It seems like there is a serious software bug here, but I can't yet identify when/why the serial numbers aren't working correctly.  Seems random to me.  I also can't seem to get any serious help with this. 

I have a paid annual subscription, is there any way for me to get some dedicated assistance?