Menu and Posts

Hi Sakin, You have been exceptionally helpful and I am very appreciative. I am a Wordpress novice, so I apologize for my naivety. My site is http://themaineproject.net and I am almost happy with it. I want my posts which appear under "The Project" to also sort by category. For example, this post http://themaineproject.net/2013/09/12/lusting-for-cronuts-and-an-insulin-pump/ should also appear under the menu "Epicure". Do I need to create a child theme to accomplish this? Regards, Susie