We have a custom database that was set up long before i started.  when populating the drawing if we have straight duct then an elbow, after the elbow, the S&D connection flips incorrectly.  This does not happen with the out of the box data base.  I have been trying to find the setting that would control this and have been unsuccessful.  Does anyone know why this is happening and how to fix it?  I have attached a pdf and the dwg file.  note it doesn't matter if i insert an elbow or a straight piece after the elbow, the connections flip.  any help would be greatly appreciated!