Melanie,
Sorry for the trouble there. The theme uses a script called masonry to try and stack the widgets in the bottom part of the home page so there are no large vertical gaps. Sometimes it can make altering the elements there just a bit finicky.
I experimented with the source code on your site and took out everything from the Custom CSS box except for the
span.more-link {
display: none;
}
which seems to have gotten the widgets at the bottom there to line up three across again.
Are you looking to have one of the widgets be a different size? If you’ll let me know which one you’d like to change, I’ll be glad to show you how to do that.
Thanks,
Bill