gabriellegliniak on "Posts show in all categories, I want it in a specific category."

I have several categories on the right: Historic Spaces, Period Details, Design Conversations, Travel, Adventures with Bob and Doris, Modern
Romantic. I have one published post, 5 Generations of Artistry... I assigned this article to Design Categories and when I look at my blog, under each category is Design Conversations (1) in blue. I thought the post would show up with the title under the category, Design Conversations. Did I set up the widgets incorrectly or is the problem in the post selection?