Solved this one to.... doing well tonight.
In /manager/actions/dynamic/mutate_content.dynamic.action.php
About two thirds the way down....
Change:
<!-- META Keywords -->
<?php
// get list of site keywords - code by stevew! modified by Raymond
$keywords = array();
$tbl = $modx->getFullTableName("site_keywords");
To:
<!-- META Keywords -->
<?php
// get list of site keywords - code by stevew! modified by Raymond
$keywords = array();
$tbl = $modx->getFullTableName("site_keywords"). " ORDER BY keyword";
The keyword list now appears in ascending alphabetical order. Much better