Image Nested Instead of Left Alignment

Hi,

I’m creating this wordpress site as a gift. The images I have added on this page started out with left alignment, which was perfect. Now the images have a nested effect. I have tried adding
and <span> but it keeps saving as the nested state. I have clear browser caches and tried on fresh computers as well, same effect. I need to present this in 2 weeks. Can someone please help me? I only know a bit of html, so if there is some code that will fix it, please list and where I should add it. Thanks so much.