Arf! Arf! Arf!
I decided to try this theme because it's based on Bootstrap. What I've noticed is that Featured Images display on both the Blog Page and the individual single posts themselves. This results in two images displaying on smart phones for each post (the Featured Image itself, and the first image on any embedded video). How come? I didn't think it was supposed to be that way. Here's an example on my own site:
I've noticed the exact same problem on numerous themes in the Themes Directory (INCLUDING the latest themes provided by Automattic on WordPress.org). It can't be a Bootstrap problem, since the Customizr Theme and other Bootstrap themes don't seem to have that problem.
Is there a snippet of WordPress Core Code that I can Cut & Paste into my theme to get rid of the problem....why does it keep showing up over and over with different WordPress Themes? Is it an intentional effort on the part of some theme designers?