Sites are not recognized on the category page and in the sidebar widget.

I manage a multisite with almost 300 subsites. I have installed Categories and defined 15 categories. Each subsite will define a min of 1 or a max of 2 categories. I have allocated 2 categories to 8 of the subsites as a trial. When I look at my selection of subsites under network admin/sites, I see the categories correctly assigned. The problem is that only 1 of these 8 categorized subsites is recognized on the categories page and in the sidebar widget.