Hello William,
Sorry for late reply to this,
Unfortunately we do not have this specific option to arrange the order from frontpage discussion post.
By default when the user reply on the Easydiscuss post, it will go to the first discussion post display on frontpage (Is follow the creation date).
If you don't like this default, you can change the code from this file ->
JoomlaFolder\components\com_easydiscuss\models\posts.php
LINE 374
case 'replylatest':
$orderby = ' ORDER BY a.`created` ASC'; //used in discussion replies
break;
case 'latest':
default:
$orderby = ' ORDER BY a.`replied` DESC'; //used in getsticky and get created date
break;
Replace with
case 'replylatest':
$orderby = ' ORDER BY a.`created` ASC'; //used in discussion replies
break;
case 'latest':
default:
$orderby = ' ORDER BY a.`created` DESC'; //used in getsticky and get created date
break;
This modification mean when user reply on that discussion post thread, it doesn't go to display on top of the first discussion post.