1. That screenshot there is for flex theme (apologies!). Sunshine theme does not support 3 columns layout which show secondary sidebar.
Sunshine theme support following 4 blog layouts as seen in the official theme demo:
1.1 Default – http://demo.simpleprothemes.com/sunshine/templates/blog/
1.2 Two Cols – http://demo.simpleprothemes.com/sunshine/2-columns/
1.3 Three Cols – http://demo.simpleprothemes.com/sunshine/3-columns/
1.4 Three Cols full width – http://demo.simpleprothemes.com/sunshine/3-columns-full/
Which out of 4 layouts do you want for your blog page?
2. Page titles are missing, most likely due to a plugin on that site. Can you send WP admin access for us to check? Just reply previous email with the login details.