1. Do you create footer as a static block? If your footer created via static block you can use elements of VC and Massive Addons plugins (Visual Composer > Role Manager > Post Types > Custom > choose all the post types you want to use VC for). Please see examples of elements that can be useful for you – http://massive.mpcthemes.net/icon-list/http://massive.mpcthemes.net/icon-column/http://massive.mpcthemes.net/connected-icon-column/
2. If you have both themes (Xstore and Xstore child) and child theme activated on your site, this is correct.
Feel free to ask if you have any other questions.
