Column-Matic WP Plugin short codes

I had this plugin working; and, then it became unstable. I would appreciate a new set of eyes.

I had successfully completed entering the content all three columns without incident. Upon final inspection I was in the process of making small pixel adjustments to line up the horizontal bars, when instability developed scrambling the right column. I deleted and have attempted to reconstruct it by copying the saved HTML code line by line in an effort to find the problem. The current status can be seen at:

http://www.artfusiongalleries.com/Responsive/

As you can see the right column is displaced toward the bottom of the page.

Here is the short code placement between the bottom of the center column; and, the attempted start of the right column:

[/column]
[column class=”column_center”]
<div style=”height: 268px; width: 734px; float: center; background-color: #ffffff; margin-left: 5px; padding: 4px; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: 14px; font-family: Cabin, Garamond, serif; overflow: auto;”>
##########Column Contents##########

<center><span style=”font-size: 10px; color: #ff0000;”>scroll for more</span></center>

<hr />

[/column]

[column class=”column_right”]
<div style=”height: 357px; width: 180px; float: center; background-color: #fffadf; margin-left: 5px; padding: 4px; font-style: normal; font-variant: normal; font-weight: normal; font-size: 12px; line-height: 14px; font-family: Cabin, Garamond, serif; overflow: auto;”><center>[wp_lightbox_prettyPhoto_image link=”http://www……………………&#8230;

I would like to send you my login and ask for a quick look to see if I have made an error that is causing this instability.

http://ww.wp.xz.cn/extend/plugins/column-matic/