Posts Widget overlaps front page widget

On the front page of https://songsinthekeyofkids.com I have three columns with content in them. The site is set up with posts as my home page. However, all of my content is in text widgets inside the Home widget and there are no posts.

However, the Posts widget overlaps my right-side column at the bottom. If you go to the site and scroll down you’ll see the overlap. How do I get rid of that? At one time I made a post of one of the pictures, but quickly found it overlapping the left-side column. How do I set it so there are no overlaps and visitors can see all of the content in each of the columns?

Thanks,

Broadlighter