Updated files not displaying on site

I am trying to update my CSS and index.php files through the Editor feature, but none of my changes are going live. When I click “Update File” I see the revised code in the Editor, but when I check the live webpage, it is pulling an old version. I have cleared my browser cache and tried deleting the cache directory from wp-cache, but to no avail.

Is this a server cache issue? Or is the Editor not pushing my changes to the server? How can I fix this or figure out what is going on?

The page I am working on is http://brewsandbrosfest.org/_test/

Here is the revised snippet of CSS I want on the page:

article.quotation-box { float: left; width: 68%; height: auto; background: #FD3F0A; }

article.quotation-box  img, article.quotation-box a img { float:left;  height: auto;}

article.quotation-box-right { float:left; width:32%; height: auto; background: #FD3F0A; }

article.quotation-box-right  img, article.quotation-box-right a img { height: auto; background: #FD3F0A; }