"When I received a box of your preserves in the mail, it was probably one of the most glamorous moments of my life... but then, I looked at the label and it said there were like 50, and then I, of course, as a very hierarchical person, was like, 'Who are these other people? Does having a lower number make me more special?'"
It's crucial to express gratitude but also important to set boundaries. A direct, yet polite communication can go a long way to prevent further misunderstandings.