The wiki editor appears twice when in page edit mode, can you help?

If you visit this page > http://www.my360plus.com/wiki/information-search/

You can see it is powered by the wiki plug-in. If you then go into edit mode, the editor appears twice... It seems to be being injected into the html at the top of the page and is clashing.

We need some help getting this plug-in working nicely, as out customers are desperate for our wiki!

Thanks.