10.5.2 class diagram shows additional inappropriate1:1 edge along with 1:* for class that has only 1:* relationships?

I'm trying to narrow this down for a good exemplar; it's happening in my 20 class domain objects package but not in a smaller package where I'm trying to reproduce the problem.

Is anybody else seeing this? You might not notice unless you have edge labels on and use a layout like Hierarchic Group that causes the edges to not draw on top of each other...