Weird Image Stacking Issue

I don’t know why this was done in the theme, but there’s a margin-left property of -60px being set on the alignleft class.

Since you didn’t create a child theme, and you currently don’t have a custom CSS plugin installed, I would install a CSS plugin like JetPack or Custom CSS Manager (my preference), then add this CSS rule:

.entry-content img.alignleft {
   margin-left: 0;
}

Wow, you work fast. Congrats.