All posts are showing in every category on main page

I need help. On my website https://www.pineknotfarmandlab.com I have used the plugin inline posts. Everything works fine with the following exception: although I have assigned the posts to categories, the sidebar category widget for each category shows ALL of the posts in every category, not the ones just assigned to that category. I emailed a couple of forums and no one seems to know how to fix this.