In order to see the difference, I changed all the image sizes to the ones you listed above and then uploaded the very same photo of your blog on my website and as you can see it has NOT generated those images for me.

http://tennisfa.com/shop/2017/06/16/the-big-design-wall-likes-pictures/

https://woodmart.xtemos.com/blog/2016/07/23/a-companion-for-extra-sleeping/