It looks like one CSS file is loading in the footer rather that in the header, and I believe that this is what is causing the page formatting to change as the site loads. I might not be correct about that, though.
The link to the file that is loading in the footer is: ..."wp-admin/admin-ajax.php?action=yop_poll_load_css&id=3&location=widget&unique_id=_yp5296622e53297&ver=4.6' "
Is there anything I could do to adjust the plugin so that the style don't change as the site loads? Thanks for your help!