Try this.
Delete within the template
postbit_legacy:
Code:
<if condition="$post['signature']">
<!-- sig -->
<div>
__________________<br />
$post[signature]
</div>
<!-- / sig -->
</if>
Search in the same template:
Code:
<!-- / edit note -->
</if>
</td>
</tr>
Add
below it:
Code:
<tr>
<td class="alt2">
</td>
<td class="alt1" align="$stylevar[left]">
<if condition="$post['signature']">
<!-- sig -->
<div>
__________________<br />
$post[signature]
</div>
<!-- / sig -->
</if>
</td>
</tr>