Code Automatic Replication

I have built a table in Dreamweaver. I copy the html code from Dreamweaver and paste it into the HTML Source Editor of CMS Builder.

The code displays perfectly and shows up as expected in the wysiwyg. When I save, close and then return to the page the code starts to replicate. Every time the page is saved further code is replicated. This does not effect the wysiwyg or the site view however when I try to edit the page it becomes very slow and stops responding.

<table align="center" cellpadding="0" cellspacing="0" style="width: 550px;">
<colgroup><col width="71"></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></col><col></

Any suggestions would be appreciated.

Regards,

Micheal