Sorry to hear of your negative experiences here Carl, however offhand I'd say maybe the TOTAL blame shouldn't go to this dealer's poor communcation skills.
You see, there were a number of other maintenence reference sources available to you out there, such as this website, which unfortunately you have appeared to discover a little late and evidently after you had decided to start maintaining your own machine, and so I'd say that you might have been at least a little culpable in this whole thing. However, with that being said, this dealer sounds to me to be badly in need of some Triumph HDQ oversight.