what i meant by the pm is you shouldn't use pm for support, unless it is related to password and stuff
anyways
don't for get to make a backup
go to your portamx.css
find
.smalltext {
font-size: 8pt !important;
}
change 8pt to 14px;
go to your boardindex.template.php
find
<p><strong>', $txt['last_post'], '</strong> ', $txt['by'], ' ', $board['last_post']['member']['link'] , '<br />
', $txt['in'], ' ', $board['last_post']['link'], '<br />
<span class="smalltext">', $txt['on'], ' ', $board['last_post']['time'],'</span>
</p>';
change to
<p>', $board['last_post']['member']['link'] , '
', $txt['in'], ' ', $board['last_post']['link'], '<br />
<span class="smalltext">', $txt['on'], ' ', $board['last_post']['time'],'</span>
</p>';
to change the date format, it is little complex, it is not included in the template file
it is built somewhere else, if you rly want to change it i advise you to trace $board['last_post']['time'] to see how data is fetched and built
as for the other edits
it could be file permission issue, i am unable to open your css files and other theme related php files
please zip the theme files and send it to me