I've been thinking about this thread and wondering what the source of the confusion was. Ross, I finally figured out that you're referring to pieces that were made after 1980 when the Expo designation was replaced by a new numbering system, which included the letters EA for the limited edition you talked about. I won't go into the the details of that numbering system, but I see now it led to the confusion with the old production numbering system where EA stood for a particular engraver.
I'm still convinced that the piece at the beginning of this thread is are production pieces, as is yours, as they are both shown in Ricke's Swedish Glass Factories, and the markings confirm that.
Hope this explains the apparent different interpretations.