1. I just dropped a widget to the post sidebar area and the issue is fixed.
2. See this post to know how to add a favicon https://www.livemeshthemes.com/support/forums/topic/setting-the-favicon-for-the-site/
3. Have rectified the issue by adding the fancy heading shortcode. You can remove it if you don’t need it.
4. I don’t see any issue with he revolution slider. Maybe you have already solved he issues.