Sidebars not showing up in posts

Here is the site I run. All the sidebar elements are shown correctly in the main page.
https://www.experiencetheskies.com/

However, when a user click a post from the main page, for example, https://www.experiencetheskies.com/cyber-monday-sale-summary/
All the left and right sidebars disappeared. I haven’t changed anything on the 2014 theme.

Also, is there a return home button plugin people can recommend or should I just include a page called home for people to click?