1. I’m not seeing a list on that page?
2. This might help: http://generatepress.com/forums/topic/equal-length-columns/page/2/#post-38550
3. It looks like you’ve set the image to align left? Is that an option in the widget? If you set it to align none or center then it shouldn’t overlap.
4. This topic might help: https://generatepress.com/forums/topic/reverse-flip-position-of-slideout-menu-right/