Hi KentM,
I have tried on chrome/firefox/ie browser, but I can not reproduce this problem. I created a two cells table like below and paste the content you provided into the cell 1, it did not added addition cell for me. I also tried to paste into cell 2 too. Do I need special steps?
<table cellspacing='2' cellpadding='2' style='width:480px'>
<tr>
<td> </td>
<td> </td>
</tr>
</table>
Regards,
Ken