osseo I went into right-sidebar-copy and add loadblock custom (again, I'm not sure how I can add custom in the same block as mainbody-content-right?
You don't need this step, I suggested to edit the block file, not the layout file
And you add the wrong syntax to load the 'custom' position, I updated for you:
<jdoc:include type="modules" name="<?php $this->_p('custom') ?>" style="raw" />
The reason I asked for ftp account is that I can help to override file in 'local' folder, there is no ftp so I edit in template folder.
I duplicated the accordion module and assign to 'custom' position and it's showing now" https://www.district279.org/pre-k
Kindly check.