[CyberAlien]

When modifying that template file I copied part of code from your default postbit template and that's where line came from. To fix it replace this:

		<!-- sig -->
			<hr size="1" style="color:$stylevar[tborder_bgcolor]" />
			<div valign="bottom">
				$post[signature]
			</div>
		<!-- / sig -->

with this:

		<!-- sig -->
			<div valign="bottom">
				$post[signature]
			</div>
		<!-- / sig -->

Columns on index don't have fixed width. To change it open template forumhome_forumbit_level1_nopost, find this code:

	<tr align="center">
	  <td class="thead">&nbsp;</td>
	  <td class="thead" width="100%" align="$stylevar[left]" nowrap="nowrap">$vbphrase[forum]</td>
	  <td class="thead" width="175" nowrap="nowrap">$vbphrase[last_post]</td>
	  <td class="thead" nowrap="nowrap">$vbphrase[threads]</td>
	  <td class="thead" nowrap="nowrap">$vbphrase[posts]</td>
	  <if condition="$vboptions['showmoderatorcolumn']">
	  <td class="thead" nowrap="nowrap">$vbphrase[moderator]</td>
	  </if>
	</tr>

and assign fixed width to last 4 table cells