[StarBuG]

If you want everyone to see the same ad you don't need the coditions.
Simply only use the member code and get rid of all the rest.

use this:

<if condition="$show['spacer']">
    </div>
    $spacer_close
</if>

<if condition="$show['spacer']">
    $spacer_open
    <div id="edit$post[postid]" style="padding:0px 0px $stylevar[cellpadding]px 0px">
    <if condition="!$post['islastshown']"><!-- this is not the last post shown on the page --></if>    
</if>

<table class="tborder" id="post$post[postid]" align="center" border="0" cellpadding="6" cellspacing="1" width="100%">
<tbody><tr>
    <td class="thead" id="td_post_$post[postid]">
   <div class="normal">
        &nbsp;
     </div>
    </td>
</tr>
<tr>
    <td class="alt1" align="center">
        <div>
     <!-- Adsense standard banner start -->
      <script type="text/javascript"><!--
      google_ad_client = "pub-5988350962952956";
      google_ad_width = 468;
      google_ad_height = 60;
      google_ad_format = "468x60_as";
      google_ad_type = "text";
      google_ad_channel = "5238041056";
      //--></script>
      <script type="text/javascript" src="http://pagead2.googlesyndication.com/pagead/show_ads.js"></script>
     <!-- Adsense standard banner End -->
        </div>
    </td>
</tr>
</tbody>
</table>

then everyone including members, guests, admins, mods etc are seeing your ad as second post.