2
I believe this is your problem:
table#cmsColumnRight {cellspacing: 0px; width: 200px;}
The left column is sized to 135px, see
#leftcolumn {
padding: 12px 5px 5px;
background-color: #F9F9F9;
width: 135px;}
But that table#cms... sized to 200px, is stretching your right column.
Hope this helps.