Lol! I mean no hate to the person but I found it funny since we used the same site and everything! I thought there was a mech. to catch dupes but I guess it is either outta service or has some areas that need to be worked on!
I frankly am amazed that Stacker works at all. Mostly it does things well. Maybe a volunteer to retract if one discovers an accidental duplicate. Or maybe you found a bug.