I figured it our finally, I took the spacer_open and close out of the equation and it works. Here is my final code...
Code:
<!-- / post $post[postid] popup menu -->
<!-- Start Sponsors -->
<if condition="(THIS_SCRIPT!='private') && (((($post[postcount]-1)%10 == 0)|(($post[postcount]-5)%10 == 0)))">
<div style="padding:6px 0px 0px 0px">
<table class="tborder" cellpadding="$stylevar[cellpadding]" cellspacing="$stylevar[cellspacing]" border="0" width="100%" align="center">
<tr>
<td class="thead" style="font-weight:normal; border: $stylevar[cellspacing]px solid $stylevar[tborder_bgcolor]; border-right: 0px" $post[scrolltothis] width="100%">
Sponsors<br /><br />
</td>
</tr>
<tr>
<td class="alt1" align="center">
<script type="text/javascript"><!--
google_ad_client = "xxxxxxxxxxxxxxxxxxxx";
google_ad_width = 468;
google_ad_height = 60;
google_ad_format = "468x60_as";
google_ad_type = "text_image";
//2007-09-17: Chattanoogans-POSTBIT
google_ad_channel = "xxxxxxxxxxxxxxxxx";
google_color_border = "F0F1FF";
google_color_bg = "F0F1FF";
google_color_link = "0000FF";
google_color_text = "5B5B5B";
google_color_url = "5B5B5B";
//-->
</script>
<script type="text/javascript"
src="http://pagead2.googlesyndication.com/pagead/show_ads.js">
</script>
</td>
</tr>
</table>
</div>
</if>
<!-- End Sponsers -->
I am running 3.6.8 with the postbit legacy template, works like a champ now.