Check the <td> of that tag in that template for any align="center"
After removing them the whole options are fixed to the left instead of going from the left side to the right.
<script language="Javascript">
function who(threadid) { window.open("misc.php?s=$session[sessionhash]&action=whoposted&threadid="+threadid, "whoposted", "toolbar=no,scrollbars=yes,resizable=yes,width=230, height=300"); }
</script>
<!-- topic table -->
<form action="forumdisplay.php" method="get">
<table cellpadding="{tableouterborderwidth}" cellspacing="0" border="0" bgcolor="{tablebordercolor}" {tableouterextra} width="{contenttablewidth}" align="center"><tr><td>
<table cellpadding="4" cellspacing="{tableinnerborderwidth}" border="0" {tableinnerextra} width="100%">
<tr bgcolor="{tableheadbgcolor}" id="cat" align="center">
<td bgcolor="{tableheadbgcolor}" nowrap colspan="3"><smallfont>
<input type="hidden" name="s" value="$session[sessionhash]">
<input type="hidden" name="forumid" value="$forumid">
<input type="hidden" name="pagenumber" value="$pagenumber">
<a href="$sorturl&sortorder=asc&sortfield=title"><font color="{tableheadtextcolor}"><b>Thema</b></font></a> $sortarrow[title]</smallfont></td>
<td bgcolor="{tableheadbgcolor}" nowrap><smallfont><a href="$sorturl&sortorder=asc&sortfield=postusername"><font color="{tableheadtextcolor}"><b>Erstellt von</b></font></a> $sortarrow[postusername]</smallfont></td>
<td bgcolor="{tableheadbgcolor}" nowrap><smallfont><a href="$sorturl&sortorder=desc&sortfield=replycount"><font color="{tableheadtextcolor}"><b>Antworten</b></font></a> $sortarrow[replycount]</smallfont></td>
<td bgcolor="{tableheadbgcolor}" nowrap><smallfont><a href="$sorturl&sortorder=desc&sortfield=views"><font color="{tableheadtextcolor}"><b>Hits</b></font></a> $sortarrow[views]</smallfont></td>
$threadrating
<td bgcolor="{tableheadbgcolor}" nowrap><smallfont><a href="$sorturl&sortorder=desc&sortfield=lastpost"><font color="{tableheadtextcolor}"><b>Letzter Beitrag</b></font></a> $sortarrow[lastpost]</smallfont></td>
</tr>
$announcement
$forumdisplaybits
<tr id="cat">
<td bgcolor="{tableheadbgcolor}" width="100%" colspan="8"><smallfont color="{tableheadtextcolor}">
<nobr>
<b>Zeige Themen $limitlower bis $limitupper von $totalthreads, sortiert nach </b>
<select name="sortfield">
<option value="title" $sort[title]>Betreff</option>
<option value="lastpost" $sort[lastpost]>letztem Beitrag</option>
<option value="replycount" $sort[replycount]>Anzahl an Antworten</option>
<option value="views" $sort[views]>Anzahl an Hits</option>
<option value="postusername" $sort[postusername]>Name des Autors</option>
$threadrateoption
</select>
</nobr><nobr>
<b>in</b>
<select name="sortorder">
<option value="asc" $order[asc]>aufsteigender</option>
<option value="desc" $order[desc]>absteigender</option>
</select>
<b>Sortierung, </b>
<select name="daysprune">
<option value="1" $daysprunesel[1]>des letzten Tages</option>
<option value="2" $daysprunesel[2]>der letzten 2 Tage</option>
<option value="5" $daysprunesel[5]>der letzten 5 Tage</option>
<option value="10" $daysprunesel[10]>der letzten 10 Tage</option>
<option value="20" $daysprunesel[20]>der letzten 20 Tage</option>
<option value="30" $daysprunesel[30]>der letzten 30 Tage</option>
<option value="45" $daysprunesel[45]>der letzten 45 Tage</option>
<option value="60" $daysprunesel[60]>der letzten 60 Tage</option>
<option value="75" $daysprunesel[75]>der letzten 75 Tage</option>
<option value="100" $daysprunesel[100]>der letzten 100 Tage</option>
<option value="365" $daysprunesel[365]>des letzten Jahres</option>
<option value="1000" $daysprunesel[1000]>von Anfang an</option>
</select>$gobutton
</nobr>
</smallfont></td>
</tr>
</table>
</td></tr></table>
</form>
<table cellpadding="2" cellspacing="0" border="0" width="{contenttablewidth}" {tableinvisibleextra} align="center">
<tr valign="top">
<td><smallfont>$newthreadlink</smallfont></td>
<td><smallfont>$pagenav</smallfont></td>
</tr>
</table>
<br>
<!-- /topic table -->